Question # 1

if time constant in RC series circuit is small, then capacitor is charged or discharged.

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Slowly

Rapidly

At constant rate

Intermittently

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

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Beta rays

Gama ryas

Alpha rays

Electron

The relative permitivity of air is

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79.5

1.006

1.06

1.0006

The highest value reached by the voltage or current is one cycle is called:

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Peak to peak value

Peak value

Instantaneous value

Root mean square value

In 1905, the special theory of relativity was proposed by

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Einstein

Bohr

Maxwell

De Broglie

In three phase A.C supply coils are inclined at an angle of.

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0^o

90^o

120^o

80^o

Magnetic flux density is measured in

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Weber

Weber/m2

Tesla -m

Gauss

The first theory about the structure of an atom was introduced by

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Neil Bohr

Einstein

Compton

Rutherford

If electron jumps from second orbit to first orbit in hydrogen atom it emits photon of.

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3.40 eV

10.20 eV

13.6 eV

3.8 eV

Kirchhoff's voltage rule is a way of stating conservation of.

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Mass

Charge

Energy

Momentum

The magnetic flux will be max, For an angle of:

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0°

60°

90°

180°

The energy equivalent of 1 kg of matter is about:

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10^-15 J

1 J

10^-12J

10^-17J

The natural frequency of L.C circuit is equal to

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substance which undergo plastic deformation until they break are known as.

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Brittle substances

Ductile substance

Non magnetic substance

Magnetic substance

In modulation, low frequency signal is known as

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Carrier wave

fluctuated signal

Modulated carrier signal

Modulation signal

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

A current generator device converts:

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Mechanical energy into chemical energy

Chemical energy into electrical energy

Mechanical energy into electrical energy

Both b and c

Photo diode detects.

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Visible light

Radio waves

X rays

All of them

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