Question # 1

The angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is:

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2.5 sec

0.06 sec

15.7 sec

0.4 sec

When a mass 'm' is pulled slowly through a distance 'x_o' , the elastic potential energy of the spring would be

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P.E=Kx²_o

P.E= 1/2kx_o

P.E=1/2Kx²_o

P.E=Kx²_o

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

The process in which energy is dissipated from the oscillating system is known as

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resonance

interference

diffraction

damping

Which of the following does not obey ohm's law?

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Copper

Al

Diode

None

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

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Longitudinal waves

Transverse waves

Water waves

Complex waves

Satellites are held in orbits around Earth by its:

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Gravitational field

Magnetic field

Own orbital motion

Own spin motion

Diameter of the atom is of the order of

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10^-10m

10^-12m

10^-15m

10^-9m

Newton published laws of motion in his famous book "principia" in

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1867

1667

1676

1687

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

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1310 W

670 W

810 W

1210 W

Frequency of red color as compared to that of violet color is:

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Equal

Smaller

Greater

None of these

Glare produces when light reflects from water snow and rough road surfaces when their angle of incidence is

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Small

Large

Very large

None of these

Blood vessels under normal conditions are inflate

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Occasionally

Some times

All the times

None of these

Two charges are placed a certain distance apart in air when a dielectric sheet is placed between them, the electro static force between them will

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Decrease

Increase

Remain unchanged

Become zero

If drag force is given by F = krv what could be the SI units of k

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kgm²s^-1

kgm^-2s^-2

kgm^-1s^-1

kgms^-1

In SI system the correct unit of Planck's constant is

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Kelvin

Js

Lux

Candela

The temperature below which materials are superconductor is called as:

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Kelvin temperature

Critical temperature

Curie temperature

none of these

Young's modulus for steel is

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100

200

300

400

In carnot cycle, there are isotherms as

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One

Two

Three

Four

When a ray of light enters a denser medium from a rarer medium,its:

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Wavelength increases

Velocity increases

Frequency decreases

Wavelength decreases

Thick tar and honey have

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Small coefficient of viscosities

Large coefficient of viscosities

Zero coefficient of viscosities

Moderate coefficient of viscosities

The atoms molecules or ions in a crystalline solids are at room temperature

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Motionless

Vibrate violently

Fixed

Simply vibrate

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