Question # 1

Which one fo the following is based on the diffraction and repulsion of electric charge.

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Capacitor motor

Transformer

Induction motor

synchronous motor

The maximum field that a dielectric material can with stand whiteout breaking down is called its.

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Di electric strength

Magnetic strength

Capacity

Resistance

Which of the following parameters is irrelevant for a fuse wire.

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Its radius

Current flowing through it.

Its specific resistance

Its length

Wattles current is said to flow when phase angle between virtual current and virtual voltage is

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0^o

90 ^o

180 ^o

270^o

What can be used as the unit of envery.

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N m-1

V A

W.s

V C-1

Lagging of magnetic flux density behind magnetic field is known as.

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Permeability

Susceptibility

Hysteresis

Uncertainty

At room temperature the p.d. between the two sides of depletion region for germanium is of the order of.

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0.3 V

0.5 V

0.7 V

0.9 V

When a balloon sticks to the whiteboard It is an example of.

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Conoduction

Induction

Polarization

Conservation of charge

When X_c = X_l, this condition is called.

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Equality

Balanced

Resonance

Equlibrium

A type of resistor whose resistance varies significantly with temperature is.

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Thermistor

Thermocouple

Strain gauge

Potentiometer

An A.C. dynamo operates on the principle of

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Mutual induction

Self induction

Electromagnetic induction

Mechanical induction

Which of the following quantity in analogous to temperature in electricity.

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Charge

Resistance

Inductances

Potential

What is the traditional name for a capacitor

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Choke

Condenser

Transformer

Inductor

The resistance of a capacitor when it is connected with a battery is.

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Zero

Finite

Infinite

The same

A charged particles moving in a magnetic field experiences a resultant force.

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Proportional to its K.E.

In the direction of the field

In the direction opposite to its motion

In the direction perpendicular to both the field and its motion

The combined effect of resistance and reactance's in A.C. circuit is called.

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Resistance

Conductance

Choke

Impedance

A semiconductor diode conducts only when it is

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Not biased

Zero biased

Reverse biased

Forward and biased

A galvanometer can be converted into voltmeter by connecting in series with the galvanometer a

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Low resistance

High resistance

Resistance of intermediate range

Shunt

Work can be stored in an inductor as.

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Elastic P.E.

Electrical P;E.

Gravitational energy

K.E.

Which we double the voltage in a simple electric circuit, we double the

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Current

Power

Resistance

Both a and b

A substance which has empty conduction band.

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Insulator

Conductor

Semi conductor

super conductor

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