Question # 1

In photovoltaic cell, current is directly proportional to.

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Wavelength of light

Intensity of light

Energy

Frequency of light

Three resistors of resistance R each are combined in various ways, Which of the following cannot be obtained?

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3 RΩ

2R /4Ω

R/3Ω

2R /3Ω

One use of a single p-n junction semiconductor in an electrical circuit is a

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Rectifier

Transistor

Battery

Diode

Binding energy for deuteron nucleus is given by

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2.8 MeV

2.23 MeV

2.28 MeV

2.25 MeV

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

Lenz's law deals with

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Magnitude of emf

Direction emf

Direction of induced current

Resistance

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

Energy produced due to fission of uranium atom is:

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500MeV

200MeV

700MeV

750MEV

Commentator was invented by

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Henry

Ousted

Maxwell

William sturgeon

Ampere second stands for the unit of.

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Charge

emf

energy

Power

amu =

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1.06 x 10^-27 kg

1.6606 x 10^-27 kg

1.520 x 10^-21 kg

1.6606 x 10^-31 kg

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

Minority carriers in P-Types , substances are.

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Electrons

Protons

Holes

Neutrons

Photodiode is used for:

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Detection of current

Detection of heat

Detection of light

Both a & b

The longest wavelength of Paschen series is.

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656 nm

1094 nm

1875 nm

2000 nm

Calculate current in 2 2R /4Ω resistor.

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1 A

2R /4Ω

R/3Ω

2R /3Ω

The activity of radioactive sample

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Is constant

Increases with time

Decreases linearly with time

Decreases exponentially with time

In Wilson cloud chamber, ß-particles leave

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Thin and continuous tracks

Thick and continuous tracks

No tracks

Thin and discontinuous tracks

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