Electricity Gk interview questions

1 Watt hour is equal to

1. 3.6x103 J
2. 3.6x104 J
3. 3.6x108 J
4. 3.6x105 J

Resistance of a conductor depends on

1. Both the material and the dimensions of the conductor
2. Material of the conductor only
3. Thickness of the conductor only
4. Length of the conductor only

The primary cell widely used is

1. Lechlanche cell
2. Lead acid accumulator
3. Dry cell
4. Daniel cell

Electromagnets are based on the principle of

1. Chemical effect of current
2. Magnetic effect of current
3. Heating effect of current
4. Mechanical effect of current

The direction of magnetic field due to a current element is given by

1. Ampere’s swimming rule
2. Faraday’s first law
3. Fleming’s left hand rule
4. Fleming’s right hand rule

Fleming’s right hand rule is used to find the direction of

1. Magnetic field
2. Electric field
3. Induced current
4. Mechanical force

The special alloy of nickel and chromium is called as

1. Gun metals
2. Stelloy
3. Nichrome
4. German silver

Electrolyte copper is claimed to be

1. 99%
2. 99.99%
3. 99.9%
4. 99.09%

If a body is charged by rubbing it, its weight

1. Remains precisely constant
2. Increases slightly
3. Decreases slightly
4. May increase slightly or may decrease slightly

______ are used to open the circuit.

1. Conductor
2. Screw
3. Switches
4. Circuit breakers

If the rubber rod is rubbed with fur ____ charge is produced.

1. Neutral
2. Positive
3. Negative
4. No change

Joules law is

1. H = IR2t
2. H = I2Rt
3. H = IRt
4. H = IRt2

The unit of potential difference is

1. Ampere
2. Ohm
3. Volt
4. Joule

1 ampere is equal to

1. 1 Farad
2. 1 Coulomb sec
3. 1 Ohm
4. 1 Coulomb

1 H.P. equals

1. 647 watts
2. 746 watts
3. 1000 watts
4. 500 watts

Electrolytes are usually in the form of

1. Plasma
2. Gases
3. Solids
4. Liquids

The emf induced in a circuit is

1. Inversely proportional to the rate of flux change
2. Inversely proportional to the flux change
3. Directly proportional to the rate of change of flux
4. Directly proportional to the change in magnetic flux

The substances appearing at the cathode are said to be

1. Electropositive
2. Electronegative
3. Positive
4. Neutral

The unit of current is

1. Ampere
2. Ohm
3. Volt
4. Coulomb

Normal power consumed by Air conditioner is

1. 500 watts
2. 600 watts
3. 700 watts
4. 1500 watts

The unit of work is equal to

1. kg m
2. Joule metre
3. Joule
4. Newton

___ found Ohm’s law.

1. George
2. Volta
3. Ampere
4. Simon ohm

The life of an electric lamp is

1. 1 H.P.
2. 746 watts
3. 1.5 H.P.
4. 1.341 H.P.

Which is not a refractory material to prevent oxidation?

1. Porcelain
2. Carbon
3. Fire clay
4. Asbestos

The magnetic effects of electric current was discovered by

1. Ampere
2. Oersted
3. Faraday
4. Maxwell

Slip rings are placed in a

1. Transformer
2. Galvanometer
3. AC generator
4. DC generator

Mechanical energy is converted into electrical energy in a

1. Loud speaker
2. Motor
3. Generator
4. Microphone

The article to be electroplated is placed at

1. Anode
2. Cathode
3. Cathode or anode
4. Electrolyte

Heat developed in a conductor is

1. Directly proportional to the square of current
2. Directly proportional to the cubic value of current
3. Inversely proportional to the current
4. Directly proportional to the current

The potential difference in electric circuit is

1. 220 V
2. 230 V
3. 240 V
4. 250 V