Question # 1

A photo diode can turn its current ON and OFF in

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Micro seconds

Mega seconds

Nano seconds

Mili seconds

The unit of impedance is.

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Henry

Hertz

Ampere

Ohm

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

Magnetic flux density is measured in

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Weber

Weber/m2

Tesla -m

Gauss

Pair production cannto take place in vacuum because :

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Mass in not conserved

Momentum is not conserved

Energy is not conserved

Charge is not conserved

Wave nature of light appears in

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Pair production

Compton effect

Photo electric

Interference

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

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Doping

Temperature

Voltage

Pressure

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

Two up quarks and one down quarks makes a

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Proton

Newton

Photon

Meson

The number of electrons in one coulomb charge is equal to

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6.2 x 10¹⁸ electrons

Zero electrons

1.6 x 10^-22 electrons

6.2 x 10²¹ electrons

In order to increase sensitivity of galvanometer the value of C may be

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Increase

Decrease

Neither increase nor decrease

Remain same

The most common source of an A.C. Voltage is.

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Motor

Cell

Generator

Thermo couple

The energy equivalent of 1 kg of matter is about:

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10^-15 J

1 J

10^-12J

10^-17J

The semi conductor diode has the property of

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Two way conduction

Zero conduction

One way conduction

Amplification

The photon with energy greater than 1.02 MeV can interact with matter as.

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Photoelectric effect

Compton effect

Pair production

annihilation of matter

The jerks in D.C. motor are created by the use of.

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Armature

Commutators

Split rings

Source of emf

Soft magnetic material is

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Sodium

Steel

Iron

Copper

The particles which do not experience strong force are called.

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Baryons

Hadrons

Mesons

Laptons

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Physics ICS Part 2 Online MCQ's Test MCQs With Answers

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