Question # 1

Direct current can not flow through.

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Inductor

Resistor

Transistor

Capacitor

A force of 0.01 N is exerted on a charge 1.2 x 10^-5 C at a certain point. The electric field at that point is

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1.2 x 10⁴ N/C

1.2 x 10⁴ C/N

8.3 x 10² N/C

8.3 x 10^-2 N/C

An atom can reside in excited state for

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10^-8 second

One second

10^-10 second

More than one second

The mean value of A.C. in a cycle is.

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1

0

I2

Nil

Step up transfer has a transformation ratio of 3:2. What is the voltage in secondary , If voltage in primary is 30 V?

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45 V

15 V

90 V

300 V

The concept of direction is purely

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Relative

Absolute

Relative to the motion

None of these

The main reason for world wide use of A.C is because:

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It is very high power

It can be transmitted over long distance

It is cheaper to use

ALl of above

Which one of the following is not affected by electric or magnetic field.

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Beta rays

Gama ryas

Alpha rays

Electron

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

Resistance tolerance for gold colour is.

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50%

30%

20%

5%

The Unit of decay constant.

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Second

(second)-1

m-1

mk

The vector sum of electric force and magnetic force is called:

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Deflecting force

Lorentz force

Newton force

Faraday's force

The combined effect of resistance and reactance in circuit is called:

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Impedance

Inductance

Capacitance

None of above

In self induction A coil is connected in__________ with battery and a rheostat.

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Parallel

Series

Both A and B

None of above

The first orbit in the hydrogen atom has a radius.

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0.53 nm

0.053 nm

0.0053 nm

0.00053 nm

EMF is induced due to change in

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Charge

Current

Magnetic flux

Electric field

The curie temp for iron is about

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800^oC

740^oC

750^oC

650^oC

the number of terminals in a semiconductor diode are

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2

3

4

5

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