Question # 1

The liquid which conduct current is known as

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heating effect

chemical energy

electrolyte

ohm's law

From sand, we get a material used for construction of computer chips. That material is called:

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Germanium

Silicon

Copper

Lead

Graph of Black body radiation is example of

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Band spectra

Continuo's spectra

Line spectra

All

In case of streamed lined flow of liquid, the loss of energy is

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Maximum

Minimum

Infinite

equal to what is in turbulent flow

The time period of pendulums of different lengths would be

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same

different

both of them

none of them

Fidelity refers to

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Reproduction of original sound

Reproduction of original image

Reproduction of music

Reproduction of a CD from original copy

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

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2.120°A

0.212°A

21.2°A

0.14°

a

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

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base and emitter

collector and emitter

base and collector

any one of these

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

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0

1

0.5

-1

When the shear stress and shear stain are involved, then their ratio is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

In the expression F x t, the force F is

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total force

instantaneous force

average force

all of them

The direction of the linear momentum is the direction of

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speed

velocity

weight

none of them

The burnt gas expelled from the rocket engine with

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High velocity

Extremely high velocity

Very high velocity

None of these

Thermodynamics is the branch of physics deals with the conversion of heat energy into

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Electrical energy

Mechanical energy

Solar energy

None of these

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be

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6 x 10^-5rad

7 x 10^-5rad

8 x 10^-5rad

None of these

The component of a vector has its direction as

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Same

Opposite

perpendicular

None of these

Moment of inertia of an object does not depend upon

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Mass of object

Mass distribution

Angular velocity

Axis of rotation

The symbol that is used to represent rotational inertia or moment of inertia is

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W

I

R

M

Satellites are objects that orbit around the

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Sun

Planet

Earth

None of these

Which one the following gives three regions of electromagnetic sepctrum in order of increasing wavelength?

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Gamma rays, micro waves, visible light

Radio waves, ultraviolet waves, X-rays

Ultraviolet rays, Infrared rays, micro waves

Visible light, gamma rays, radio waves

pgh in Bernoulli's equation has unit of

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Volume

Force

Work/Volume

None of these

According to the first condition of equilibrium, vector sum of all the forces action on the body must be

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maximum

minimum

zero

none of them

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