How do magnets and copper wire make electricity?
Last Answer : According to Faradays law , a changing magnetic field on a conductor induses current in the conductor through mutual induction.
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162 views
1 answer
asked
Mar 10, 2018
by
anonymous

A fuse wire should have : (A) Low specific resistance and high melting point (B) Low specific resistance and low melting point (C) High specific resistance and high melting point (D) High specific resistance and low melting point
Last Answer : A fuse wire should have : High specific resistance and low melting point
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113 views
1 answer
asked
May 8, 2018
by
anonymous

How to Install an Above Ground Pool
Last Answer : How to Install an Above Ground Pool Having an above the ground pool would be a nice addition to your house. It can be a source of fun and recreation. There is even a good variety of above the ground ... for you to clean and balance out the pool's water. This should be done before you swim in it.
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8 views
1 answer
asked
May 14, 2021
by
anonymous

How to Ground an Outlet
Last Answer : How to Ground an Outlet The industry standard for electrical outlets is that they must be grounded. On older homes and appliances, electrical outlets installed on the wall may not be grounded at all ... you can replace the old-fashioned electrical system in your home and replace it with safe ones.
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6 views
1 answer
asked
May 14, 2021
by
anonymous

Describe the concept of virtual ground with reference to op-Amp.
Last Answer : Virtual ground concept:-In circuit point A is virtual ground. Figure shows inverting amplifier using op-amp. In this circuit non-inverting terminal is connected to the actual ground. Due to ... zero potential without actually grounding is known as virtual ground concept. Circuit diagram:
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184 views
2 answers
asked
May 2, 2020
by
anonymous

A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are : (A) less than 66 kV (B) lie between 66 kV and 110 kV (C) more than 165 kV (D) lie between 110 kV and 165 kV
Last Answer : A minimum clearance of 6.3 m to ground is required for overhead lines when operating voltages are : lie between 66 kV and 110 kV
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153 views
1 answer
asked
Apr 30, 2018
by
anonymous

If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then (A) zero sequence currents are present on both sides of the transformer (B) ... side (D) zero sequence currents are present on the primary side but not on the secondary side
Last Answer : If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then zero sequence currents are absent on both sides of the transformer
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228 views
1 answer
asked
Apr 29, 2018
by
anonymous

On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be?
Last Answer : On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be zero at its upper end.
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135 views
1 answer
asked
Mar 22, 2018
by
anonymous

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be?
Last Answer : On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be upwards at its upper end.
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346 views
1 answer
asked
Mar 22, 2018
by
anonymous

The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?
Last Answer : The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.
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116 views
1 answer
asked
Mar 20, 2018
by
anonymous

Last Answer : To avoid electric shock from electrical appliances to the human body
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155 views
2 answers
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Sep 10, 2017
by
anonymous

How to Solder Copper Pipe
Last Answer : How to Solder Copper Pipe Copper tubing or pipes work well for air, water or even refrigerants. If you want to join them together with sweat joints , you'll have to learn how to solder them ... effect on their efficiency. Follow these steps and be able to do copper pipe soldering all by yourself.
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8 views
1 answer
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May 15, 2021
by
anonymous

How to Patina Copper
Last Answer : How to Patina Copper Patina is that tarnish coating that develops outside metal, like copper, over time. Not only does it add an attractive appearance to copper, but it also provides protection to harsh ... egg. Once you've reached the desired patina coat, rinse the copper pieces in lukewarm water.
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4 views
1 answer
asked
May 14, 2021
by
anonymous

How to Clean Copper
Last Answer : How to Clean Copper Whether it's a coin, a pan, or a trophy, copper has one of the nicest-looking finishes among common metals. Copper can retain its finish for quite a while, although it is ... properly. With these tips, you'll never have to worry about your copper items losing their shine again.
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3 views
1 answer
asked
May 12, 2021
by
anonymous
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Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Last Answer : Parts Insulating Materials Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils. ... Transformer bushings Porcelain Insulation between transmission line and pole. Porcelain
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199 views
1 answer
asked
May 7, 2020
by
anonymous

Why is aluminium used instead of copper for overhead cables?
Last Answer : Because copper reacts with atmosphere variation and it's cost High as compared to aluminium and aluminium is good property and less cost so aluminium is used
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138 views
6 answers
asked
Aug 18, 2019
by
anonymous

Which is a semiconductor: copper, silicon, or neon?
Last Answer : Copper is a metal. Silicon is a semiconductor. Neon is inert gas.
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2.8k views
1 answer
asked
Jul 1, 2019
by
anonymous

Compare copper and aluminium.
Last Answer : Copper Aluminium Resistivity is less Resistivity is more More weight Low weight Mechanically strong Mechanically weaker Specific Gravity high Specific Gravity Low ... Tensile strength is half of that of copper Used for winding Used for overhead lines
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75 views
1 answer
asked
Sep 4, 2018
by
anonymous

A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is
Last Answer : A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is 0.707
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774 views
1 answer
asked
May 8, 2018
by
anonymous

At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total loss at maximum efficiency is : (A) 7000 W (B) 6000 W (C) 8000 W (D) 4000 W
Last Answer : At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total loss at maximum efficiency is : 6000 W
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303 views
1 answer
asked
Apr 30, 2018
by
anonymous

Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be?
Last Answer : Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be 10 ohms.
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318 views
1 answer
asked
Mar 25, 2018
by
anonymous

Current velocity through a copper conductor is
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121 views
0 answers
asked
Mar 25, 2018
by
anonymous

Last Answer : Copper brushes in D.C. machine are used where low voltage and high currents are involved.
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112 views
1 answer
asked
Mar 20, 2018
by
anonymous

Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is?
Last Answer : Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is approximately equal to 1.
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160 views
1 answer
asked
Mar 19, 2018
by
anonymous

explain skin effect in copper interconnects. what are the various ways of reducing this effect?
Last Answer : Skin effect generally observed in ac conductor in transmission network, in skin the current flowing through outer layer of conductor is more than iner area of conductor thus we can say the ... for reducing this effect we can use boundel conductor or used hollow conductor for power transmission
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100 views
1 answer
asked
Dec 13, 2017
by
anonymous

What gauge wire is in ethernet cable?
Last Answer : “Cat 5 cable typically has three twists per inch of each twisted pair of 24 gauge (AWG) copper wires within the cables.” (source)
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3 views
1 answer
asked
Feb 27
by
anonymous
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How to Wire Speakers
Last Answer : How to Wire Speakers Powerful speaker serve many purposes. Amongst these purposes are entertainment during special occasions and event sound system. To maximize its use, you need to understand how much ... long screws rather than short ones. Short screws may not be able to properly secure speakers.
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8 views
1 answer
asked
May 15, 2021
by
anonymous

How to Wire a Lamp
Last Answer : How to Wire a Lamp Wiring a lamp is something you need to do just in case your lamp breaks, and it so happens you keep on forgetting to get it repaired. It's a relatively easy process, with ... by yourself will also be a great help if you found the perfect lampshade from the flea market. Good luck.
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10 views
1 answer
asked
May 15, 2021
by
anonymous

How to Wire a House
Last Answer : How to Wire a House Wiring a home is a challenging but worthwhile task. Familiarize yourself with things involved in wiring a home before you start this project. Make this your first priority because ... out more by hiring someone with both experience and expertise to help you in your first attempt.
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10 views
1 answer
asked
May 15, 2021
by
anonymous

How to Wire a Three-Way Switch ?
Last Answer : How to Wire a Three-Way Switch A three-way switch is the most common system installed in residential areas. This system is used to control a light and receptacle or more from two different switches ... wires for interior use. #14 wires are suggested to be used for protected circuits at 15 amperes.
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12 views
1 answer
asked
May 9, 2021
by
anonymous

How to wire a Ceiling Fan ?
Last Answer : How to wire a Ceiling Fan To wire a ceiling fan is a relatively easy project. Usually, it is similar to working on replacing an existing light fixture. However, you will also need to check the ... have a loose wire connection. In case your fan vibrates or shakes, check if the blades are balanced.
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13 views
1 answer
asked
May 8, 2021
by
anonymous

What happens when a neutral wire touches a phase wire ?
Last Answer : Maximum current flow due to Short circuit, limited value of fuse will burn else apparatus and conductor will be damaged.
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109 views
2 answers
asked
Aug 21, 2019
by
anonymous

Which wire can carry a higher current stranded wire or solid wire?
Last Answer : From the formula R=PL/A resistance rise with the fall of surface area ,inverse proportion relation between Resistance and Area ,so stranded wire has more area that a solid wire so more area less resistance. Less resistance/less electron flow opposition,more electron flow (current)
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349 views
5 answers
asked
Aug 18, 2019
by
anonymous

Why should switch be connected only on the live wire and never on the neutral wire?
Last Answer : Current runs from the transformer, through the protective device, through the load and back through the protective device (if on RCD). If the protective device is only a CB the current passes ... the circuit will operate correctly but this is an unsafe practice and does not meet the standards.
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87 views
5 answers
asked
Aug 18, 2019
by
anonymous

State functions of ; i) Cable box ii) Guard wire iii) Shackle insulator iv) Stay wire used in service connection
Last Answer : i) Function of Cable box: To hold and inspect incoming and outgoing terminals ii) Function of Guard wire : A grounded conductor placed beneath an overhead transmission line in order to ground ... in service connection: To give mechanical Support to pole, line and prevent leakage current if any
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147 views
1 answer
asked
Sep 20, 2018
by
anonymous

The function of steel wire in ACSR conductors is (A) To take care of surges. (B) To reduce corona. (C) To reduce inductance. (D) To provide additional mechanical strength
Last Answer : The function of steel wire in ACSR conductors is To provide additional mechanical strength
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3.5k views
1 answer
asked
May 8, 2018
by
anonymous

Increasing the number of turns of wire on the secondary of a transformer will (A) Decrease the secondary current (B) Increase the primary current (C) Have no effect on the secondary current (D) Increase the secondary current
Last Answer : Increasing the number of turns of wire on the secondary of a transformer will Decrease the secondary current
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1.3k views
1 answer
asked
May 8, 2018
by
anonymous

For a round wire, the approximate value of fusing current is given by
Last Answer : For a round wire, the approximate value of fusing current is given by K√d3
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194 views
1 answer
asked
May 3, 2018
by
anonymous

Aluminium is not used as winding wire for the armature of a dc machine because (1) aluminium has low resistivity (2) a large winding space is taken by aluminium conductors and creates ... ) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper
Last Answer : Aluminium is not used as winding wire for the armature of a dc machine because (2) a large winding space is taken by aluminium conductors and creates jointing problems (3) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper
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621 views
1 answer
asked
Apr 29, 2018
by
anonymous

lf the wire which is vertical to this page has electron flow downwards the conductor will have
Last Answer : lf the wire which is vertical to this page has electron flow downwards the conductor will have a counter-clockwise field in the plane of the paper
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180 views
1 answer
asked
Apr 26, 2018
by
anonymous
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Nichrome wire is an alloy of?
Last Answer : Nichrome wire is an alloy of nickel and chromium.
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72 views
1 answer
asked
Mar 25, 2018
by
anonymous

If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?
Last Answer : If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 0.4 ohm.
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212 views
1 answer
asked
Mar 25, 2018
by
anonymous

The resistance of a few meters of wire conductor in closed electrical circuit is?
Last Answer : The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.
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356 views
1 answer
asked
Mar 25, 2018
by
anonymous

Wire-wound resistors are unsuitable for use at high frequencies because they?
Last Answer : Wire-wound resistors are unsuitable for use at high frequencies because they exhibit unwanted inductive and capacitive effects.
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152 views
1 answer
asked
Mar 25, 2018
by
anonymous
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A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span?
Last Answer : A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span 4.0 cm.
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3.4k views
1 answer
asked
Mar 22, 2018
by
anonymous

Last Answer : In order to achieve high accuracy, the slide wire of a potentiometer should be as long as possible.
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217 views
1 answer
asked
Mar 21, 2018
by
anonymous

What happens when a current flows through a wire?
Last Answer : Current can produce two effect one is heating effect and second is magnetic effect.
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126 views
2 answers
asked
Mar 14, 2018
by
anonymous

What is ACCC wire?
Last Answer : Aluminum Conductor Composite Core
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112 views
1 answer
asked
Mar 10, 2018
by
anonymous

How is electricity passed through a wire?
Last Answer : A wire contains mobile electrons as majority charge carriers and holes as minority charge carriers when an emf or potential diffrence is provided , electrons flow in opposite direction with holes(convection current flow)
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149 views
3 answers
asked
Mar 10, 2018
by
anonymous

Which color wire is neutral?
Last Answer : Black but I think it depends with the place.
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224 views
3 answers
asked
Dec 22, 2017
by
anonymous
