Question # 1

The force exerted by earth on moon is :

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2.01× 1020 N

2.01× 1020 Kg

2.01× 1021 N

2.01× 1022 Kg m/s2

Melting point is also known as:

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Moiling point

Freezing point

Fusion point

None of these

In a dam the water energy is called:

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Heat energy

Electrical energy

G.P.E

Mechanical enrgy

A body of mass 5 kg i moving with a velocity of 10 ms^-1. Find the force required to stop it in 2s.

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5 N

25 N

20 N

30 N

The Earth is surrounded by a cover of air called

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Atmosphere

Solid

Environment

Surroundings

Barometer was first set up by:

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Robert

Torricelli

Al Razi

Nil

The S.I unit of efficiency is :

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J/s

Nm

watt

It has no unit

Unit of moment arm (L) is:

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Meter

Mole

Newton

Nm

Latent heat of fusion of water is:

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3.36 x 10¹⁰ Jkg^-1

93.6 x 10¹⁰Jkg^-1

3.36 x 10⁵Jkg^-1

None of these

A minor but sudden fall in atmospheric pressure is followed by

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a storm and a rain

an intense weather

a pleasant weather

a poor weather

The process in which heat is transfer due to actual movement of molecule is called.

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Conduction

radiation

Convection

All of these

Which of the following tasks are performed by most of the algorithms?

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Input

Out put

Processing

All of these

The unit of spring constnat is:

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m

kg

Nm²

Nm^-1

which can be used to distinguish between insulators and conductors:

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electricity

telescope

temperature

electroscope

If current is flowing from bottom end to the top end in a wire, according to right hand rule the direction of line of forces would be:

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Anti-clock wise

Clock wise

Left and Right

Along the conductor.

A data storage device is:

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Printer

Hard disk

Monitor

CPU

What is the voltage across a 6Ω resistor when 3 A of current passes through it?

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2 V

9 V

18 V

36 V

What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A?

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4.8 W

14.5 W

30 W

60 W

Sound waves having frequency higher than 20,000 Hz are called:

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Ultrasonic

Infrasonic

Audible

Echo

The equivalent resistance of a parallel combination is:

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Equal to sum of all resistance

Is greater than the largest resistance of combination

Is smaller than the smallest resistance of combination

All of these

electric intensity is a quantity:

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scalar

vector

base

none of these

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

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Absorbed

Totally reflected

Partially reflected and partially transmitted

Totally transmitted

Multimode step index fibre is useful for

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Long distances

Short distances

Better quality

Low price

An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.

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0 K

0 ^oC

100 K

100 ^oC

Two waves of same frequency and moving in the same direction produces.

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Interference

Diffraction

Beats

Stationary waves

The SI unit of flow rate are

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m-sec^-2

m³-sec^-1

m³-sec^-2

m-sec^-3

Oscillation of shock absorber of a car is practical example of.

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simple harmonic motion

Forced oscillation

Damped oscillation

Undamped oscillation

In stationary waves the points which always remain at rest are.

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Nodes

Antinodes

Crest

Trough

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

The dimension of power is

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MLT-1

ML2T-2

ML2T2

ML2T-3

The actual efficiency of property turned petrol engine is.

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20% to 30%

30% to 35%

40% to 45%

25% to 30%

The ability of reveal the minor details of an object under examination is called.

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Resolving power

Magnification

Scattering

Reflection

Kg ms-1 can also be written as

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Nm

Ns

Ns-1

Js

Natural rubber is an example of:

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Crystalline solids

Amorphous solids

Polymeric solids

None of above

Electron vibrating 94,000 times each second will produce radio waves of frequency.

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94 Hz

940 HZ

94 Hz

490 Hz

The quantity/factor h/m_oc has the dimensions of.

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Length

Time

Mass

Energy

Electric intensity due to an infinite sheet of charge is:

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∂/2ε_∘

∂/rε_∘

∂/r2ε_∘

none of these

The inductive reactance of a coil is direction proportional to.

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Inductance

Resistance

Frequency of A.C.

Both frequency of A.C. and inductance

The half life of radioactive elements depends upon

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Temperature

Nature of element

Amount of the radioactive substance

Pressure

A step up transformer is used 120 V line to provide 240 V. If primary coil has 100 turns the number of turns is secondary is.

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50

100

150

200

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

The north pole of a magnet is brought near a metallic ring. The direction of induced current in the ring will be:

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Antoclockwise

Clockwise

First Clockwise and then Antoclockwise

First anticlockwise and then Clockwise

Which one of the following bulbs has the least resistance.

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100 W

200 W

500 W

1000 W

The converses of annihilation of matter is:

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Photoelectric effect

Relativistic effect

Pair production

Compton effect