Question # 1

A two inputs NAND gat with inputs a and b has an output '0' if.

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B is zero

A is zero

Both A and B are 1

Both A and B are '0'

The mass of beta particle is equal to mass of.

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Protons

Electrons

Neutrons

Boron

Which factor does not affect the conductivity of PN-Junction diode.

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Doping

Temperature

Voltage

Pressure

1 rem =

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0.001 SV

0.01 SV

0.1 SV

1.01 SV

A pentaralent impurity in Si

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a free electron and a free hole

a free hole

a free electron

No free particle

A photon while passing thorugh a magnetic field are deflected towards:

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North pole

South pole

Are ionized

None of these

The capacitance of a capacitor depends upon.

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Thickness of plates

Charges on the plates

Voltage applied

Geometry of the capacitor

Max planck received noble prize in:

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1927

1932

1918

1914

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None of the above

The Direction of induced current is always so as to oppose the change which causes the current, is:

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Faraday's law

Lenz's law

Ohm's law

Kirchhoff' s1ast rule

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

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0°

60°

90°

180°

The velocity of an oscillating charge as it moves to and fro along a wire is.

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Changing

Constant

Infinite

zero

Pair production occurs only when energy of photon is at least equal in:

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1.02keV

1.02 eV

1.02 MeV

1.02 GeV

In three phase A.C. generator the phase difference between each pair of coil is.

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45^o

90^o

120^o

60^o

Radioactivity happen due to the disintegration of

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Nucleus

Mass

Electrons

Protons

The rest mass x ray photon is

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Infinite

Zero

1.67 X^-17 kg

All of the above

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

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1 x 10^-6 N

6.4 x 10^-17 N

3.6 x 10^-24 N

4 x 10⁶ N

The number of neutron present in a nucleus in a given by

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N = A+Z

N = A- z

N = Z - A

N = A X Z

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