What is colour code of resistors , Please explain ?

What is colour code of resistors , Please explain ?
by

1 Answer

Answer :

Colours to denote value. In four band colour coding, the first band indicates the first digit,  the second band : the second digit and the third band : the number of zeroes.
by

Related questions

Three resistors of resistance R are connected in various ways, which of the following cannot be obtained? a. 3R ohm b. 2R/4 ohm c. R/3 ohm d. 2R/3 ohm

Description : Three resistors of resistance R are connected in various ways, which of the following cannot be obtained? a. 3R ohm b. 2R/4 ohm c. R/3 ohm d. 2R/3 ohm

Last Answer : b. 2R/4 ohm

Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f? a. 40 W b. 90W c. 100W d. 120W

Description : Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f? a. 40 W b. 90W c. 100W d. 120W

Last Answer : b. 90W

The colour band on the extreme left in general purpose fixed resistors represents:

Description : The colour band on the extreme left in general purpose fixed resistors represents: A) Tolerance B) First significant digit C) Wattage Rating D) Voltage Rating

Last Answer : The colour band on the extreme left in general purpose fixed resistors represents: First significant digit

Tolerance value of Gold of colour coded resistors is _______.

Description : Tolerance value of Gold of colour coded resistors is _______. A. 10% B. 5% C. 2% D. 20%

Last Answer : Tolerance value of Gold of colour coded resistors is 5%. 

The color code of green is a. 8 b. 3 c. 5 d. 7

Description : The color code of green is a. 8 b. 3 c. 5 d. 7

Last Answer : c. 5

A resistor is handed to you for identification with the following color code: the first band is blue, followed by gray, green, gold, and brown. What is the resistor’s value?

Description : A resistor is handed to you for identification with the following color code: the first band is blue, followed by gray, green, gold, and brown. What is the resistor’s value?

Last Answer : 6,800,000 ohms (6.8 mega ohms), with 5% tolerance, and a 1% reliability level.

Explain what happens if a DC motor is fed with AC supply

Description : Explain what happens if a DC motor is fed with AC supply

Last Answer : Motor will run at low speed, sparking at brushes, heat due to eddy current will finally burn the motor.

Explain the condition for Paralleling of Alternators?

Description : Explain the condition for Paralleling of Alternators?

Last Answer : The following conditions must be fulfilled for proper synchronizing of alternators. The terminal voltage of the incoming machine must be approximately equal to bus-bar voltage. The frequency of the incoming ... sequence of the incoming machine voltages must be the same as that of the bus-bars.

Briefly explain how an electrical generator converts mechanical energy into electrical energy

Description : Briefly explain how an electrical generator converts mechanical energy into electrical energy.

Last Answer : Working principle of DC generator: * Working principle of DC generator is the principle of dynamically induced emf or electromagnetic induction. * According to this principle, when flux is cut by a conductor, an ... , the flux is cut by the armature winding and an emf is dynamically induced in it. 

Briefly explain how the power factor of an inductive circuit can be improved.

Description : Briefly explain how the power factor of an inductive circuit can be improved.

Last Answer : As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit. 

Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties.

Description : Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties. 

Last Answer : Following are requirements of conductor:- i) High conductivity :  Material should have high conductivity, So that * cross section of conductor (size) reduces, * Copper losses reduces, * So Efficiency ... . Boiling point is 1820°C 9. Specific gravity is 2.7 10. High resistance to corrosion. 

Why earthing is essential in electrical installation ? Explain any one type of earthing.

Description : Why earthing is essential in electrical installation ? Explain any one type of earthing. 

Last Answer : Following reasons earthing is essential in electrical installation :   1. To provide an alternative path for the leakage current to flow towards earth. 2. To save human life from danger of electrical shock ... G.I. pipe of size 19mm and funnel for pouring the water in earth pit when required.

Explain significance and purpose of electrical measurement system.

Description : Explain significance and purpose of electrical measurement system.

Last Answer : ➢ Significance of Electrical Measurement System  1. The measurement is required for measurement of all physical quantities for e.g speed, velocity, temperature, pressure etc.  2. All electrical ... 4. These standards and references may changes time to time, area to area person to person 

Explain the electrical characteristics of transformer.

Description : Explain the electrical characteristics of transformer.

Last Answer : Transformer electrical characteristics: Area of primary and secondary conductors, Apri and Asec: Winding loss Pw: Flux density and core loss: Leakage inductance: ... transformer span. The rise in temperature may breakdown insulation which may cause failure of the transformer.

5) An iron ring of mean circumference of 80 cm is uniformly wound with 500 turns of wire. Calculate the value of flux density that a current of 1 A would produce in the ring. Assume relative permeability 1400.

Description : Please ripley me due to emergency

Last Answer : To calculate the flux density in the ring, you need to use the following formula: B = (μ * I * N) / (2 * π * r) where: B is the flux density in the ring (in teslas) μ is the relative permeability ... 2 * π * 0.127 m) = 0.53 T So the flux density in the ring would be approximately 0.53 teslas.

Can you help me solve my electrical mystery?

Description : Can you help me solve my electrical mystery?

Last Answer : Any signs of animal life? They can get in the walls and chew on the wires. Or is it the entire area served by that breaker? The breaker could be bad. It happens with anything mechanical.

How to tell if a power strip is burned out?

Description : How to tell if a power strip is burned out?

Last Answer : answer:Personally, I would either toss it, or down grade it to outdoor use only. I wouldn’t take a chance with it in the house. Yes, you can let it cool down, then test it again. But a failure is a failure. Does it have a reset button? What price range did you pay?

I accidently soaked an extension cord. Is it safe to use it again after letting it dry out for awhile?

Description : I accidently soaked an extension cord. Is it safe to use it again after letting it dry out for awhile?

Last Answer : The plug end is easier to dry out than the socket end get out your blow-dryer and set it to high and blow the end that got wet for a while. That will get most of the water off/out of ... up or sputter. Most modern extension cords are pretty watertight so there shouldn't be any water down the wire.

How can a solar array power source be bypassed when the batteries run low?

Description : How can a solar array power source be bypassed when the batteries run low?

Last Answer : Ah got it. If anyone else is interested, you need an “automatic transfer switch” – or get a manual one for that mad scientist charm.

How to stop a signal going through a wire?

Description : How to stop a signal going through a wire?

Last Answer : Use a switch or a variable resistor

Air conditioning will not turn on, is it electrical?

Description : Air conditioning will not turn on, is it electrical?

Last Answer : Pull the Thermostat off the wall and see if it is connected correctly to the AC switch. There should be no dangling wires, and the post labeled for the AC should have an attached wire.

What is the speaker driving voltage of an amplifier?

Description : What is the speaker driving voltage of an amplifier?

Last Answer : I have to ask WHY? That said, Speakers and a light bulb are two different types of load, and the the lights will probably fry the output transistor.

Why is my Garbage disposal leaking water from the bottom?

Description : Why is my Garbage disposal leaking water from the bottom?

Last Answer : Replace it. The seal is leaking, and most cases it is just not worth the cost and work, quicker and cheaper to replace it .

Have you ever taken a shower or bath during an electrical storm?

Description : Have you ever taken a shower or bath during an electrical storm?

Last Answer : I’ve heard this rumor, and I too question it’s validity. I mean, if electricity can’t travel up a stream of urine (See mythbusters) I’m pretty sure it couldn’t travel through a shower stream. Perhaps through the drain? In either case, I’ve taken a shower in a storm before, and.. well, you see?

Electrical breaker box is buzzing-why??

Description : Electrical breaker box is buzzing-why??

Last Answer : No! Do not upgrade the breaker. The wire must also be upgraded if you do. Try plugging it in a different room. Is the problem still there?

Laptop What ?

Last Answer : Laptop Yes A Portable Computer.

circuit I mean What ?

Last Answer : electricity Source , conductor , control Instruments , Usage Machines , Protection Machines In combination Such A Path Whose The middle With Current Flowing To be Can Him Circuit Or Circuit Says.

House Wiring How much? Type, What? What ?

Last Answer : House Wiring Mainly Two Type. A ) Surface Wiring B ) Concealed Wiring Surface Wiring 5 Type : 1 ) Batten Wiring 2 ) Conduit Wiring 3 ) Clit Wiring 4 ) Casing Wiring 5 ) M. S. Wiring Concealed Wiring Again Two Type , 1 ) Concealed Conduit 2 ) Concealed Wire Wiring

Coulomb Who Say ?

Last Answer : any Conductive The middle With One Ampere Flow One Seconds Hold on Let's go Of Any Cross section With That Amount Infusion Flowing Is Him One Coulomb Says.

Power Who Say ?

Last Answer : that At the rate Electron Flowing Become Work Done Is Or That At the rate Electricity Power Other In strength Transformed Is Him Electric Power Says.

Power Who Say ?

Last Answer : any Person Or Of the object Single In time Made Of work The amount Power Says.

Magnetic Tell me Line What ?

Last Answer : any Magnetic In the case A Isolated The answer To the pole In the free state Placement If you do The pole That Path Circulation By Him Magnetic Ball line Says.

Mutual Inductance What?

Last Answer : that Features Or Of religion Due As well as Two Coil Of one Of current Of change As a result In the other Voltage Obsessed Is That said Religion Or Features Mutual Inductions Says.

Cable Who Say ?

Last Answer : Cable Being Electric Conductive His Whose The middle With Current Movement By

Her And Wire In The difference What ?

Last Answer : her And Cable In The difference Yes His Yes Just Only A Conductor Where Cable Two Or Even more Of the conductor A Group.

Electrical Wiring Who Say ?

Last Answer : Wire Through In load ( e.g. fan , lamp ) Etc. ) electric Power Supply To do Ordinary To the system Electric Waring Says. General In a sense Load Electric Power Supply To do For Of wires Ordinary In the system Being Electric Waring.

Process Who Say ?

Last Answer : Operating Of the system Of work Basic Single Who Process Says.

Stepper Motor What ?

Last Answer : Stepper Motor Such One Kind of Motor Which Equal In the corner Rotation Generated By To whom Step To say Is Since Step by step Step by step Equal In the corner Rotation Creation By So This one Stepper Motor Says.

Modulator What ?

Last Answer : Modulator Horo Modem Of In full The first Part.it Digital To the signal Analog In the signal Transformed By

Universal Motor What ?

Last Answer : that Motor AC And DC Both Supply A. Let's go Him Universal Motor Says.

Optical Fiber What ?

Last Answer : Optical Fiber Holo - glass Or Of plastic Too much Narrow , long Flexible But Solid Fiber Or Fiber. One Place From Other In place Electric Signal Exchange Of payment For Optical Fiber Use To do Is.

None Of the brand AC Good ?

Last Answer : Primary Idea : - First Home Type Understand AC To buy Will be That In the room AC Put it on In that If The window Stays However Likes According to Good Brand See ' window AC ' Bought To take Can. Of ... go 45 From 60 Thousands Money In The same Price In ' Gree ' Of the brand Window AC Found Will go

ACR Electricity Cost How much? To come Can ?

Last Answer : yours Tons Accordingly AC Use To do Can However That Depending By You How much? Tuk Watt A. That Usage Do His On. You A. Except Sources Accordingly Get out To do Can AC How much? Current Usage Doing. Source : ... = 6000/1000 = 8 _ _ In other words You 3 Hours Usage If you do 3 Unit Cost Will be

Fan Gently If you run What? Electricity Cost Less Is it

Last Answer : electricity Fan Gently Or Loud Anyway Let's go No. Why Electricity Same Cost Is 3 Because Fan To walk Control Is Regulator Or Regulator Through And Electricity Cost The work Regulator Before The end ... More Power Eat Regulator The rest Eat Fan. So Turn around Back Electricity Cost The same Being 3

a The fridge To buy I want to. Which one? More Electricity Affordable Will ?

Last Answer : Singer Refrigerator And Walton Refrigerator Electricity Affordable 3

Why ELCB cannot work if Neutral input of ELCB does not connect to ground?

Description : Why ELCB cannot work if Neutral input of ELCB does not connect to ground?

Last Answer : ▪ ELCB is used to detect earth leakage fault. Once the phase and neutral are connected in an ELCB, the current will flow through phase and that same current will have to return neutral so ... that full fault current will come back through ELCB, and there will be no difference in current.

Moving coil in dynamometer wattmeter connected a) In series with fixed coil b) Across supply c) In series with load d) Across load

Description : Moving coil in dynamometer wattmeter connected a) In series with fixed coil b) Across supply c) In series with load d) Across load

Last Answer : Ans: Across supply

A 0-10 mA PMMC ammeter reads 5mA in a circuit; its bottom control spring snaps out suddenly the meter will now read. a) 5mA b) 10mA c) 2.5mA d) 0

Description : A 0-10 mA PMMC ammeter reads 5mA in a circuit; its bottom control spring snaps out suddenly the meter will now read. a) 5mA b) 10mA c) 2.5mA d) 0

Last Answer : Ans: 0

The transfer function of a system is 10/(1+s) when operating as a unity feedback system, the steady state error to a step input will be a) 0 b) 1/11 c) 10 d) Infinity

Description : The transfer function of a system is 10/(1+s) when operating as a unity feedback system, the steady state error to a step input will be a) 0 b) 1/11 c) 10 d) Infinity

Last Answer : Ans: 1/11

In a thyristor Latching current is ________ than Holding current a) Equal b) Less c) Greater d) None

Description : In a thyristor Latching current is ________ than Holding current a) Equal b) Less c) Greater d) None

Last Answer : Ans: Greater