Question # 1

The output of two input is zero only when its.

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Both inputs are zero

Either input is zero

Both inputs are one

Either input is one

The name of the scientist who noted that a compass needle was deflected when placed near the current carrying conductor

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Henry

Faraday

Coloumb

Oersted

Which series lies in the ultraviolet region.

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Balmer series

Bracket series

Ptund series

Lyman series

One joule of energy absorbed per kilogram of a body is

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Roentgen

Grey

Rem

Curie

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

When gama rays are emitted, the nuclear mass.

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Decreases by 4 units

Does not change

Increases by 2 units

Increase by 1 unit

Boher proposed his atomic model in:

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1910

1911

1912

1913

For which material medium, force between two charged particles is maximum.

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Ammonia

Germanium

Mica

Teflon

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None of the above

Semiconductors have conductivity of order:

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10^-8 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10² to 10⁵ (Ωm)^-1

10^-5 to 10^-7 (Ωm)^-1

In RLC series circuit at resonance the phase difference between capacitor and inductor reactance is.

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90^o

270^o

0^o

180^o

Unit of impedance is:

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Ohm

Ohm^-1

no unit

Ohm m^-1

If both the magnitude of charges and distance between them is doubled, then coulomb's force will be.

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Doubled

Hlaf

Remain same

One fourth

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

The motional emf depends upon the

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Length of conductor

Speed of conductor

Strength of magnet

All of these

Which one has the least resistance.

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Galvanometer

Ammeter

Ohm meter

Volta meter

The AC system is preferred to DC system because:

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AC voltage can be easily changed in magnitude

DC motor angular velocity is affected badly

High voltage AC transmission is less efficient

Domestic appliance require AC voltage for their operation

The existence of positron was discovered in:

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1929

1928

1931

1933

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