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

Thermistor with high - ve temperature coefficient are very accurate for measuring low temperature especially near is.

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10 kelvin

70 kelvin

200 kelvin

35 kelvin

Farad is defined as

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"Coulomb/Volt

Ampere /Volt

Coulomb /Joule

Volt/Coulomb

The reactance of inductor depends upon

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L

All of the above

The peak to peak value of alternating voltage is

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2V_o

V_o

None of these

The input resistance of an op amplifier is.

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Low

High

Zero

Equal to output resistance

Electron volt is the unit of.

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Potential

Potential difference

Electric current

Electric energy

The head produced by the passage of current through a resistor is.

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H= I²Rt

H = IR²t

H = 1/Rt

H = I²/Rt

To convert a galvanometer into a volt meter a high resistance is connected.

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In series

In parallel

In perpendicular

Along tangent

Which is not true for X rays

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X rays are not defected by electric field

X rays are polarized

X rays consist of electromagnetic waves

X rays can be diffracted by grating

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

In A.C circuit of inductor which one is true

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Voltage leads current by phase angle π/2

Voltage lags current by π/2

Current leads voltage by π/2

Both remain in phase

The induction can be increased by winding the wire around a core made of.

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Copper

Silicon

Iron

Aluminum

Minimum number of semi conductor diodes required for full wave rectification are.

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1

2

3

4

Binding energy for deuteron nucleus is given by

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2.8 MeV

2.23 MeV

2.28 MeV

2.25 MeV

In the equation if f₂ > then

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Resistance of choke is

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zero

Large

Very small

Infinite

The relative permitivity of air is

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79.5

1.006

1.06

1.0006

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