Question # 1

An electronic computer is basically a vast arrangement of electronic switches which are made from

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Resistors

Transistors

N -type crystals

P-Type crystals

Capacitors

Galvanometer is a device used for the detection of

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voltage

current

temperature

pressure

The liquid which conduct current is known as

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heating effect

chemical energy

electrolyte

ohm's law

The permeability of free space is measured in:

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Wb/Am

Wb A/m

Am/Wb

m/Web A

None of these

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

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Circular and endless

Oval in shape and endless

Straight

Parabolic

All are true

The passage of current is accompanied by a magnetic field in the surrounding space:

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Always accompanied

Sometimes accompanied

Never accompanied

Any of above

None of these

The system international (SI) is built from _______ kind of unites

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Two

Three

Four

Five

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

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Increasing by a factor of 2

Decreasing by a factor of 2

Decreasing by a factor of 4

Unchanged

A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:

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8.1 X 10⁷N

625 N

6250 N

None of these

Branch of physics which deals with the study of stars and galaxies is called:

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Solid state physics

Astrophysics

Molecular physics

Chemical physics

The second law of thermodynamics is concerned with the circumstances in which

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heat can be converted into work

direction of flow of heat

none of them

both of them

It is a common characteristic of all types of wave motion that

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Particles move up and down

Particles move back and forth

Energy is transferred without the transport of particles

A material medium transmits the disturbance

Significant figure in 0.00110

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One

Two

Three

Four

Light waves are

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Transverse waves

Longitudinal waves

Compressional wave

None of these

Position vector is a vector which is drawn

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From one point to another

From origin to that point

Always from origin to that point

None of these

If the radioactive substance reduces to 𝟏 𝟏𝟔 PHYSICS of its original mass in 40 days then its half-life is:

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10days

20days

40days

4days

The speed of sound in air is

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320 ms^-1

323 ms^-1

330 ms^-1

333 ms^-1

A boat of mass 40 kg os at rest.A dog of mass 4 kg moves in the boat with a velocity of 10 m/s.What is the velocity of boat?

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4 m/s

2 m/s

8 m/s

1 m/s

Can the resultant of 2 vectors be 0?

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Yes when the 2 vectors are same in magnitude and direction

No

Yes when the 2 vectors are same in magnitude but opposite in sense

Yes when the 2 vectors are same in magnitude making an angle of 2π/3 with each other.

The second condition for equilibrium describes that

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ΣFx = 0

ΣF_y = 0

ΣF = 0

Στ = 0

One mole of (NH₄)₂HOP_{4 contains _ moles of hydrogen atoms:}

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1

5

6

9

The escape velocity of Earth in Kms^-1

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9.75

11.2

12.3

15.6

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