Question # 1

The effective resistance offered by the resistance capacitance and inductance in an A.C. circuit is known as

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Impedance

Resistance

Capacitance

Reactance

Two magnetic lines of force

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Out near the poles

Never cut each other

Cut at a neutral point

Cut according to position of the magnet

Which method of charging is involved in making lightning.

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Induction

Friction

Contact

Convection

Object may acquire an excess or deficiency of charge by

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Rubbing them together

Grounding them

Applying coulomb's principle

Shielding them

No current flows between two charged bodies when connected if they have same.

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Charge

Capacity

Potential

Shape

The energy stored per unit volume inside the solenoid is called.

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Energy density

Mass density

Charge density

Volume density

A 800 W toaster and a 1.3 kW frying pan are plugged into the same 120 V lines, then

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Fuse will not blow

Fuse will blow

Supply will spark

Only toaster can work

An Electric kettle should always be fitted with an earth connection as a protective device What is being protected by the earth connection.

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The cable connecting the kettle

The fuse in the circuit

The heating element of the kettle

The person using the kettle

The process due to which current flows only during alternate half cycle is known as.

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Filtration

saturation

Half wave rectification

Full wave rectification

Thermocouple is combination of.

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Thermocouples

Capacitors in parallel

Resistors in series

Ammeter and voltmeter

Which is the fundamental quantity in electrostatic.

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Electric charge

Electric potential

Electric field

Electric field intensity

If air is replaced by any other dielectric medium, the force between two charges.

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Decreases

Increases

Remain the same

Becomes infinity

On which factor mutual induction of two coils does not depends upon.

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Number of turns of the coils

Area of cross section of the coils

Closeness of the coils

Shape of the coils

A material in which resultant magnetic moment is zero.

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Diamagnetic

Paramagnetic

Ferromagnetic

Anti ferromagnetic

An uncharged di electric body experience a force when placed in an electric field if.

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A field in non zero at the body

The electric is a polar material

The dielectric is a non polar material

The field is non uniform over the body

A pure capacitor is connected in an AC circuit The power factor of the circuit will be.

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Unity

Infinity

0.5

Zero

How eddy current losses are reduced in A F and R F transformers.

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By using air cores

By using shell cores

By using laminated cores

By using ferrite cores

The SI unit of mutual induction a

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Vs-1 A-1

V m -1 A-1

Henry

Tesla

The cosine of the phase angle between the current and voltage in an A.C. circuit is called the

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Lead factor

Lag factor

Dissipation factor

Power factor

Which part of D.C motor reverses the direction of current through the coil every half cycle.

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The armature

The commutator

the brushes

The slips rings

The negative of the potential gradient is

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Potential energy

Electrostatic force

Electric field intensity

Electromotive force

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