Question # 1

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

A germanium atom is

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Monovalent

Diavalent

Travalent

Tetravalent

Which two terminal passive electronic component implements electrical resistance as a circuit element.

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Capacitor

Inductor

Resistor

Transformer

Which one is not a semiconductor.

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Go As

Ge

Sc

In

Which of the following is the ability to hold an electric charge in electromagnetism.

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Resistance

Impedance

Inductance

Capacitance

At high frequency the current through a capacitor will be

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Small

Zero

Large

Infinity

Which one of the following materials has negative temperature coefficient.

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Conductors

Semiconductors

Insulators

Covalent bonds

Magnetic moment is a

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Scalar

Vector

Phasor

Tensor

A current carrying loop lying-in a magnetic field behaves lime a.

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Magnetics pole

Magnetic material

Magnetic dipole

Horse shoe magnet

If the transformer turns ratio is 2 and the impedance eof primary coil is 250 Ohms then the impedance secondary coil will be.

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125 Ohms

250 Ohms

500 Ohms

1000 Ohms

Select the one that is not a donar

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P

AS

Sb

In

The minimum value of charge on any object is.

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1.6 x 10^-29 C

1.6 x 10^-19 C

1.6 x 10^-9 C

1 C

Such an inductor coil which does not consume energy and is often employed for controlling A.C. without consumption of energy is called.

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Reactance

Choke

Impendence

Diode

In the equation P = IV cos Theta Cos theta is known as

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Phase angle

Liming angle

Phase

Power factor

The immediate cause of alternating currrent in the secondary coil of a transformer is

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A changing electric field

a changing magnetic field

The motion of primary coil

The iron core of the trnasformer

Which incapability of the materials is represented by the phenomenon of hysteresis.

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Magnetic saturation

Low susceptibility

Retrace the path

Orientation

A dry battery can deliver 3,000 J energy to a small 2 W electric motor before the battery is exhausted for how minutes does the motor run.

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20 minutes

25 minutes

75 minutes

125 minutes

The measure of how strongly a material oppose the flow of electrical current is known as

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Electrical resistivity

Specific electrical resistivity

Volume resistivity

All of the above

When a point charge which is responsible for a force being exerted on another point charge is suddenly moved the second charge experience.

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Nor charge of force

An instantaneous change of force

A sudden change of force of some later time

an increase of its charge because of induction.

When forwarded bias is applied to a junction diode it.

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Increases the potential barrier

Decreases the potential barrier

Reduces the majority carrier current to zero

Reduces the minority carrier current to zero

Iron loss in a dynamo arises because of.

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The resistance of armature coil

The production of eddy current

The presence of mechanical friction

The leakage of flux

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