Question # 1

Commentator was invented by

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Henry

Ousted

Maxwell

William sturgeon

The dimensions of Plank's constant is same as that of.

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Energy

Power

Acceleration

Angular momentum

The first superconductor was discovered in:

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1831

1911

1921

1876

Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

For normal use:

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Emitter base function is reversed biased

Collector base junction is reserved biased

Emitter base junction is forward biased

Both c and b

During each cycle A.C. voltage reaches a peak value.

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Once

Twice

Thrice

Four time

Photodiode is used for wave nature of.

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Light

Thermal radiation

Radi waves

Sound waves

The solids are classified as

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Polymeric

Amorphous

Crystalline

All of above

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

The velocity of electron moving is 1st orbit of hydrogen atom is:

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2.09 x 10⁶ ms^-1

2.18 x10⁶ ms^-1

2.19 x 10⁶ ms^-1

3.18 x10⁶ ms^-1

A° is the unit of:

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Energy

Length

Nuclear energy

Work

The material whose resistivity becomes zero below a certain temperature

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Conductors

Semi conductors

Super conductors

Insulators

The SI unit of decay constant is

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m

m^-1

S^-1

Nm^-1

The most suitable metal for making permanent magnet is.

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Iron

Aluminium

Steel

Copper

A current carrying conductor experience maximum magnetic force in a uniform magnetic field when it is placed.

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Perpendicular to field

Parallel to field

At an angle of 60 ^o to the field

None of these

If the distance between two charges is halved and charges are also doubled, then force between them will be.

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Two time

Four time

Eight time

Sixteen time

the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to.

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25 N

20 N

10 N

15 N

Greater concentration of impurity is added in.

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Base

Emitter

Collector

LED

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Physics Fsc Part 2 Online Test MCQs With Answers

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