Description : A copper wire has a resistance of \( 0.60 hm \). Anozner copper wire of the samemass as the first one is dou ble in length of the first. Find the resistance of the second wire.
Last Answer : A copper wire has a resistance of \( 0.6 0hm \). Another copper wire of the same mass as ... of the first. Find the resistance of the second wire.
Description : The temperature coefficient of copper is `0.004^(@)C^(-1)`. Find the resistance of a 5 m long copper wire of diameter 0.2 mm at `100^(@)C`, if the res
Last Answer : The temperature coefficient of copper is `0.004^(@)C^(-1)`. Find the resistance of a 5 m long copper wire of ... `0^(@)C` is `1.7xx10^(-8) Omega` m.
Description : Given that resistivity of copper is `1.68xx10^(-8) Omega`m. Calculate the amount of copper required to draw a wire 10 km long having resistance of `10
Last Answer : Given that resistivity of copper is `1.68xx10^(-8) Omega`m. Calculate the amount of copper required to draw a ... copper is `8.9xx10^(3) kg m^(-3)`.
Description : `1kg` piece of copper is drawn into a wire `1mm` thick and another piece into a wire `2mm` thick. Compare the resistance of these wires.
Last Answer : `1kg` piece of copper is drawn into a wire `1mm` thick and another piece into a wire `2mm` thick. Compare the resistance of these wires.
Description : Two copper wires A and B of equal masses are taken. The length of A is double the length of B. If the resistance of wire A is `160 Omega `, then calcu
Last Answer : Two copper wires A and B of equal masses are taken. The length of A is double the length of ... Omega `, then calculate the resistance of the wire B.
Description : If a copper wire is increased to double its length, its resistance will become – (1) four times (2) one-fourth (3) double (4) half
Last Answer : (3) double Explanation: There is a direct relationship between the amount of resistance encountered by charge and the length of wire it must traverse. After all, if resistance occurs as the result of collisions ... the atoms of the wire, then there is likely to be more collisions in a longer wire.
Description : A coil is wound with 400 feet of No. 16 tinned copper wire and connected to a 12 volt battery. What is the current if the resistance per 1000 feet of No. 16 tinned copper wire is 4.26 ohms? A. 4.8 amps B. 7.06 amps C. 10.65 amps D. 11.27 amps
Last Answer : Answer: B
Description : A coil is wound with 200 feet of No. 16 tinned copper wire and connected to a 12 volt battery. What is the current if the resistance per 1000 feet of No. 16 tinned copper wire is 4.26 ohms? A. 1.14 amps B. 7.04 amps C. 10.22 amps D. 14.08 amps
Last Answer : Answer: D
Description : Which of the following statements about copper wire sized by the AWG rating is correct? A. Number 12 AWG wire has a higher current rating than number 10 AWG wire. B. Number 10 AWG wire has a higher ... Number 12 AWG wire at 25°C has more resistance per 1000 feet than No. 10 AWG wire at 25°C.
Description : Which of the following statements concerning copper wire sized by AWG numbers is correct? A. Number 12 AWG wire has a higher current rating than 10 AWG wire. B. Number 12 AWG wire at 25°C has more ... dielectric strength than 12 AWG wire. D. Number 12 AWG wire is larger than number 10 AWG wire.
Description : When the current flow through a copper wire increases, its _____________. A. resistance will decrease B. insulation will burn C. temperature will increase D. conductivity will increase
Last Answer : Answer: C
Description : What is the diameter of a copper wire to be used in a 16 km loop with a dc loop resistance of 100 ohms/km? A. 0.108 cm B. 1.082 cm C. 0.017 cm D. 0.0465 cm
Last Answer : D. 0.0465 cm
Description : The resistance wire used in a hot wire anemometer for conducting electrical current is made of (A) Copper (B) Tungsten (C) Chromium (D) Aluminium
Last Answer : (B) Tungsten
Description : Which wire has the least resistance? Wire A-copper, 1000 circular mils, 6 inches long. Wire B-copper, 2000 circular mils, 11 inches long.
Last Answer : Wire B.
Description : If a copper wire is increased to double its length, its resistance will become (1) four times (2) one–fourth (3) double (4) half
Last Answer : double
Description : Resistance of a copper wire decreases when ......................increases
Last Answer : Resistance of a copper wire decreases when diameter increases
Description : If Verizon FIOS hookup is brought to a condo building but the old copper wire is used inside does that obviate FIOS?
Last Answer : answer:Short answer is NO. Don’t worry, any copper or wifi will give better throughput than what you get. I would use details if I was sober. ipod is playing Journey
Description : A copper wire 4 mm in diameter is evenly wound about a cylinder whose length is 24 cm and diameter 20 cm so as to cover the surface. -Maths 9th
Last Answer : answer:
Description : Why copper is used in electric wire ?
Last Answer : Copper is a metallic substance. It is electrically conductive i.e. capable of carrying copper electricity. So copper is used in electrical wires.
Description : A copper wire of diameter 0.16 cm is connected in series to an aluminium wire of diameter 0.25 cm. A current of 10 A is passed through them. Find (i)
Last Answer : A copper wire of diameter 0.16 cm is connected in series to an aluminium wire of diameter 0.25 cm. A ... of aluminium wire is `10^(29) m^(-3)`.
Description : The free electrons of a copper wire of cross-sectional area `10^(-6) m^(2)` acquire a drift velocity of `10^(-4) m//s` when a certain potential differ
Last Answer : The free electrons of a copper wire of cross-sectional area `10^(-6) m^(2)` acquire a drift velocity of `10 ... is `8.5xx10^(28) "electrons"//m^(3)`.
Description : Calculate the electric field in a copper wire of cross-sectional area `2.0 mm^(2)` carrying a current of 1 A. The resistivity of copper `=1.7xx10^(-8)
Last Answer : Calculate the electric field in a copper wire of cross-sectional area `2.0 mm^(2)` carrying a current ... of copper `=1.7xx10^(-8) Omega`m.
Description : A current of 4.8 A is flowing in a copper wire of cross-sectional area `3xx10^(-4) m^(2)`. Find the current density in the wire.
Last Answer : A current of 4.8 A is flowing in a copper wire of cross-sectional area `3xx10^(-4) m^(2)`. Find the current density in the wire.
Description : The drift speed of electrons in copper wire of diameter and length `l` is `v` . If the potential difference across the wire is doubled, then the new d
Last Answer : The drift speed of electrons in copper wire of diameter and length `l` is `v` . If the potential ... `2upsilon` C. `3upsilon` D. `upsilon//2`
Description : How are copper wire and aluminum foil alike?
Last Answer : negative charges can't move through them
Description : What purpose does the plastic cover and the copper in a wire serve?
Last Answer : The copper is a good conductor of electricity. While the insulating plastic covering of the wire prevents bare wires touching and creating a short, or shocking (electrocuting) a person should the bare wire be touched with bare hands.
Description : What is the purpose of the copper wire with no insulation in a wind turbine?
Last Answer : Feel Free to Answer
Description : Is a copper wire a insulator or conductor?
Last Answer : conductor
Description : How to separate pieces of copper wire from a mixture of wood chips, sand and salt?
Last Answer : Separating Salt and Sand Using Solubility Pour the salt and sand mixture into a pan. Add water. ... Heat the water until the salt dissolves. ... Remove the pan from heat and allow it to cool until it's safe to handle. Pour the salt water into a separate container. Now collect the sand.
Description : Earth wire or ground wire is made of: a) copper b) aluminium c) iron d) galvanized steel
Last Answer : Ans: D
Description : If a fuse blows frequently, one should (a) replace it with a thin wire (b) replace it with a thick copper wire (c) replace it with a paper clip (d) call an electrician
Last Answer : Ans:(d)
Description : Fuse wire is made of an alloy of ______. (1) Lead and Copper (2) Tin and Copper (3) Tin and Lead (4) Copper and Silver
Last Answer : (3) Tin and Lead Explanation: The material used for making fuse element has a low melting point such as tin, lead, or zinc.
Description : Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron
Last Answer : (3) copper is a better conductor of electricity than iron Explanation: Copper is generally preferred for electrical power transmission instead of iron because of its high electrical conductivity and low resistivity.
Description : Fuse wire is made of an alloy of – (1) Tin and Lead (2) Tin and Copper (3) Lead and Copper (4) Copper and Silver
Last Answer : (1) Tin and Lead Explanation: The common material used as fuse wire is an alloy of tin and lead (63% tin and 37% lead). Fuse wires provide over current protection of an electrical circuit ... wire or strip that melts when too much current flows through it, thereby interrupting the flow of current.
Description : A fuse wire is made of: (1) an alloy of tin and copper (2) an alloy of tin and lead (3) an alloy of tin and aluminium (4) an alloy of nickel and chromium
Last Answer : (2) an alloy of tin and lead Explanation: Electric fuse wire is an alloy made of tin (63 % lead 37 %. The cross sectional area determines the melting point at a certain current. Alloys (e.g. ... resulting combination of good conductivity (due to the tin) with a low melting point due to the lead).
Description : Wire in general, when used aboard vessels must meet minimum requirements. Which of the following statements is/are correct? A. Each wire must be 14 AWG or larger, regardless of locations and use. B. ... enclosure or cover is the ground wire used with portable tools and lights. D. All of the above.
Description : When changing fuses and the spring clips are found to have lost their grip, they should be replaced or _____________. A. tightened firmly with insulated pliers B. clip clamps should be used C. wired closed with uninsulated, varnished copper wire D. carefully bent back to their original shapes
Description : Modulation means A. Varying of information B. Utilization of a single transmission channel to carry multiple signals C. Varying of some parameters of a carrier such as its amplitude to transmit information D. Transmit pulses in DC form on a copper wire
Last Answer : C. Varying of some parameters of a carrier such as its amplitude to transmit information
Description : Why cannot a copper wire be used to make elements in electric heater?
Last Answer : Answer: Copper melts at 108.3^0C and forms a black powder on reacting with atmospheric oxygen. For heater elements a metal should have more resistance to produce heat.
Description : In hot wire anemometer used for gas flow measurement, the wire is normally made of (A) Copper (B) Platinum (C) Constantan (D) Chromium
Last Answer : (B) Platinum
Description : Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing. (A) Oxygen (B) Arsenic (C) Antimony (D) Bismuth
Last Answer : (D) Bismuth
Description : Which of the following pairs will have greater conduction and why ? (a) Copper wire at 25 °C and Copper wire at 50 °C. (b) 0.1 M acetic acid solution or 1 M acetic acid solution ?
Last Answer : (a) Copper wire at 25 °C because with increase in temperature metallic conduction decreases due to vibration of kernels. (b) 0.1 M acetic acid solution because with dilution degree of dissosciation increases and hence no. of ions.
Description : At yield point' of a copper wire A. the load hasn't exceeded the elastic limit yet; so, Hooke's law applies B. the load has already exceeded the elastic limit and the material has become ... stage has passed and the wire has snapped already D. Like Brass and Bronze, Copper has no yield poin
Last Answer : the load has already exceeded the elastic limit and the material has become plastic
Description : Mean drift velocity of electron in a copper wire having cross-sectional area 5.0 × 10-6 m2 carrying current of 1 A and having number density 8.5 × 1028 m3 is A. 0.015 mm s-1 B. 0.1 mm s-1 C. 0.5 mm s-1 D. 0.25 mm s-1
Last Answer : 0.015 mm s-1
Description : Which of this is not a guided media? a) Fiber optical cable b) Coaxial cable c) Wireless LAN d) Copper wire
Last Answer : c) Wireless LAN
Description : The joint for soldering is supported by binding wire made of (A) Mild steel (B) Copper (C) Soft iron (D) Stainless steel
Last Answer : Option C
Description : A copper wire is bent to form an equilateral triangle of area 16√3 sq.cm. What will be the area (in sq.cm) if the same copper wire was bent to form a square? a) 16 b) 24 c) 32 d) 40 e) None of the above
Last Answer : Area of equilateral triangle = 16√3 = √3 (side)2 /4 Or side2 = 16×4 = 64 So each side = 8cm Perimeter = 8×3 = 24 cm Since perimeter of the square is 24 cm, each side = 6cm So area = 6×6 = 36 sq cm Answer: e)
Description : The ground wire should not be smaller than No ______ copper. (a) 2 (b) 4 (c) 6 (d) 10
Last Answer : (d) 10
Description : Conduction in which type of semiconductor material is similar to conduction in a copper wire?
Last Answer : N-type material.
Description : What procedure involves the use of finely braided copper wire to remove solder?
Last Answer : Wicking.