Question # 1

The first atomic reactor was introduced by

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Currie

Enrico Fermi

Newton

Bohr

In three phase voltage across any two lines is about.

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220 V

230 V

400 V

430 V

The wave form of alternating voltage is a

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Cotangent curve

Cosine curve

Sine curve

Tangent curve

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

When 10 V are applied to an A.C circuit, the current flowing in it is 100 mA. It impedance is.

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100 Ohm

10 Ohm

1000 Ohm

1 Ohm

The net charge on a capacitor magnitude of charge of charge

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Infinity

2 q

Q/2

Zero

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

Metals are good conductors of electricity because they have

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Large number of bounded electrons

Small number of electrons

Large number of free electrons

Small number of free electrons

The e/m of a neutron is

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Less than electron

The same as electron

Zero

Greater than election

The Grid 'G' in cathode ray oscilloscope.

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Accelerate as well as focus electron beam

Control no. of electrons beam

Is at - Ve potential with respect to cathode.

Both d and b

The total charge of any nucleus is:

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Ze

Z

Both a and b

None of above

The X-rays diffraction with crystal was first studied by

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W.H Bragg

W.L. Bragg

Michelson

None of these

1 gray is equal to.

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1 JKg-1

1KgJ-1

1JKg

1 JKg-2

Choke consumes extremely small

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Current

Charge

Power

Potential

The north pole of a magnet is brought near a metallic ring. The direction of induced current in the ring will be:

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Antoclockwise

Clockwise

First Clockwise and then Antoclockwise

First anticlockwise and then Clockwise

Electric intensity due to an infinite sheet of charge is:

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∂/2ε_∘

∂/rε_∘

∂/r2ε_∘

none of these

Materials can be identified by measuring their

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Mass

Half life

Both a and b

None of a,b,c

The device which allows only the flow of D.C. is.

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Capacitors

transformer

Inductor

Generator

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