Question # 1

If 1 x 10⁷ electrons passes through a conductor in 1.0 micro second , then the current is.

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2 A

1.6 A

2.6 x 10^-6 A

1.6 x 10^-6 A

The background radiation to which we are exposed, on the average is.

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1 mSv per year

2 mSv per year

3 mSv per year

4 mSv per year

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

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

Kx -Xrays are produced due to transition of electron from.

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K to L shell

L to K shell

M to K shell

M to L shell

The resistivity of two wires isρ₁ andρ₂ which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:

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(ρ₁ +ρ₂)

1/ρ₁+ 1/ρ₂

ρ₁+ρ₂/2

ρ_1/ρ₂

The resistivity of --------------------decrease with the increase in temp

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Gold

Silver

Copper

Silicon

Which one of the following is polymeric solids

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Glass

Nylon

Copper

Zinc

The value of capacitive reactance is given by

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Xc = VI

All of above

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

In a pure inductive A.C. circuit the current.

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Lags behind voltage by 90 ^o

Leads the voltage by 90 ^o

In phase with voltage

Leads the voltage by 270 ^o

Which of the following has least hysteresis loop area.

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Steel

Wrought Iron

Soft Iron

Cobalt

Which of the following has bulk modulus?

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Water

Gas

Honey

All

B2/2p is the expression of.

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Lenz's law

Magnetic energy

Magnetic energy density

Back emf

In frequency modulation which factor changed.

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Amplitude of charge carriers

Frequency of charge carriers

Amplitude of signal

Frequency of signal

Xc =

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1/2πfc

2πfc

2π/fc

fc/2π

1 rad =

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0.001Gy

0.01Gy

0.1Gy

1.01Gy

When the back emf in a current is zero, it draws

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Zero current

Maximum current

Minimum current

Steady average current

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