Gk Electricity interview questions

All the magnetic materials lose their magnetic properties when

1. Strongly heated
2. Dipped in oil
3. Dipped in water
4. Brought near a piece of iron

A motor converts

1. Electrical energy into mechanical energy
2. Mechanical energy into electrical energy
3. Mechanical energy into sound energy
4. Electrical energy into sound energy

The inherent property of all matter is/are

1. Para magnetism
2. Diamagnetism
3. Ferromagnetic
4. None of these

The reciprocal of resistance is

1. Conductivity
2. Resistivity
3. Conductance
4. None of these

Magnetite is a/an

1. U-shaped magnet
2. Natural magnet
3. Electromagnet
4. None of these

Tangent galvanometer is used to measure

1. Earth’s magnetic field
2. Steady currents
3. Currents impulses
4. None of these

Laws of electrolysis is given by

1. Bohar
2. Lenz
3. Maxwell
4. Faraday

Fuse wire should have

1. High resistance, high melting point
2. High resistance, low melting point
3. Low resistance, low melting point
4. Low resistance, high melting point

Good resistance coils are made of

1. Silver
2. Gold
3. Manganin
4. Copper

The resistance of material increases with temperature. It is a

1. Semiconductor
2. Insulator
3. Metal
4. None of these

Which one of the following is used in storage batteries?

1. Copper
2. Tin
3. Lead
4. Zinc

A fuse wire is always connected to the

1. Neutral wire
2. Line wire
3. Earth wire
4. None of these

The resistance of an ideal ammeter is

1. Infinite
2. Zero
3. Very low
4. Very high

The conductivity of superconductor is

1. Zero
2. Infinite
3. Very large
4. Very small

The electrolyte in the dry cell is

1. Ammonium chloride
2. Acid of sulphur
3. Zinc
4. Manganese dioxide

Faraday’s law of electromagnetic induction is related to the

1. Law of conservation of charge
2. Law of conservation of energy
3. Third law of motion
4. None of the above

An example for diamagnetic substance is

1. Aluminium
2. Copper
3. Iron
4. Nickel

The capacitance unit of convenient size is

1. Mega farad
2. Kilo farad
3. Microfarad
4. Farad

In a hydel station the motion produced in turbines is due to the

1. Production of steam
2. Flow of water
3. Burning of diesel
4. Burning of coal

A fuse wire is made of

1. An alloy of tin and copper
2. An alloy of nickel and chromium
3. An alloy of tin and aluminium
4. An alloy of tin and lead

Magnetic field inside a solenoid is

1. Directly proportional to current
2. Inversely proportional to current
3. Inversely proportional to the total number of turns
4. Directly proportional to its length

The resistance of an ideal voltmeter is

1. Zero
2. Very low
3. Very high
4. Infinite

The coil of an electric heater is made of

1. Nichrome
2. Lead
3. Aluminium
4. Tungsten

When magnet is heated, it

1. Loses its magnetism
2. Gains magnetism
3. Gains magnetism up to certain temperature
4. None of the above

The electrolyte in a car battery is

1. Distilled water
2. Nitric acid
3. Sulphuric acid
4. Hydrochloric acid

Fe, Co and Ni are examples of

1. Diamagnetic
2. Paramagnetic
3. Ferromagnetic
4. Dipolar

Electro motive force is most closely related to

1. Mechanical force
2. Potential difference
3. Magnetic field
4. Electric field

A transformer works with

1. Any signal
2. Alternating current
3. Direct current
4. Both AC and DC

Electron volt (eV) is a unit of

1. Current
2. Energy
3. Charge
4. Potential