Question # 1

The energy present in our food is:

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Mechanical energy

Gravitational potential energy

Chemical energy

Nuclear energy

Land and Sea breezes are the results of:

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Conduction

Convection

Radiation

Conduction and Radiation

On Uranus the daytime temperature is ___________

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216 °C

-216 °C

-200 °C

-100 °C

The ratio of useful output to input energy is called:

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Power

Energy

Efficiency

Horse power

Degree of hotness or coldness of the body is called:

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Heat capacity

Thermal conductivity

Heat

Temperture

The value of 'g' on the surface of moon is:

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1.62 ms^-2

10 ms^-2

20 ms^-2

Zero

The turning effect of force is called:

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Torque

Parallel force

Equilibrium

Couple

The height of geostationary satellites with respect to Earth is

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36,300 km

40,300 km

30,300 km

42,300 km

The orbital speed of a low orbit satellite is:

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Zeri

8 ms^-1

800 ms^-1

8000 ms^-1

What is unit of momentum?

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Kg m/s

m

c

Nil

Consider a rigid body. As it rotates, its particles move in fixed

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Squares

Circles

Triangles

Rectnagles

The device which is used to convert sound waves into electrical signal is called:

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Ear piece

Microphone

Transmission channel

Receiver

Changing magnetic field in a closed circuit can induce:

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e.m.f

Electric current

Force

Both A and B

Thye Water waves obey the laws of

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Reflection

Refraction

Diffraction

All of these

Joule’s law is W=

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IR/t

IRt²

IR²t

I²Rt

The unit of electrical energy is:

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Joule

Watt

Volt

Electron volt

When a body moves to and fro about a point its motion is called:

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Random motion

Linear motion

Vibratory motion

Rotatory motion

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

Time period is reciprocal of:

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Frequency

Cycle

Wavelength

Amplitude

What does the term e-mail stand for:

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Emergency mail

Electronic mail

Extra mail

External mail

The electrostatic force acting on two charges each of 1 C separated by 1m is about .

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9 x 10⁹ N

9 x 10^-9N

9 x 10⁸N

9 x 10^-8N

When an electric current passes through a conductor, which field is produced around it?

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Electric field

Magnetic field

Gravitational field

Electrostatic field

Which material has maximum viscosity

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Glycerin

Plasma

Methanol

Water

The pitch of sound deepens upon

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Intensity of sound

Loudness of sound

Wavelength of sound

Frequency of sound

When a body moves in circular motion, the angle between linear and angular velocity is.

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180^o

90^o

60^o

75.3^o

Blood has density equal to that of

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Mercury

Sodium

Honey

Water

Almost all the raw energy is librated from

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Heat

Earth

Light

All of these

The resultant of two forces 3 N and 4 N acting at right angle to each other is

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7 N

5 N

4 N

1 N

The wavelength of fundamental note in one end closed pipe in term of length 'l' of pipe is.

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4 l

2l

l

1/4 l

If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.

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30 m

15 m

1 m

28 m

A body rotating with angular velocity of 2 radian/s and linear velocity is also 2 ms-1, then radius of circle is.

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1 m

0.5 m

4 m

2 m

The terminal velocity can be obtained by using

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Newton's law

Stock's law

Guass's law

None of these

When water falls from tap, its cross sectional area decrease due to.

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Decrease of speed

Increase of speed

Air pressure

Gravity increase

The unit of induced emf is

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Ampere

Volt

Joule/coulomb

Both (b) and (c)

The resistivity of two wires isρ₁ andρ₂ which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:

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(ρ₁ +ρ₂)

1/ρ₁+ 1/ρ₂

ρ₁+ρ₂/2

ρ_1/ρ₂

The energy of photon is givne by

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mv2/2

hf

Va e

mac¹

Potentiometer is used to.

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Compare emf of two cells

Detect internal resistance of cell

Measure P.D.

All of these

In RLC circuit the energy is dissipated in

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R only

R and L

R and C

L and C

The unit of strain is:

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Nm

Nm^-2

no unit

Nm²

The electric intensity at infinite distance from the point charge is

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Infinite

Zero

Positive

Negative

Weber is the unit of

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Magnetic flux

Permeability

magnetic force

None of above

A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when:

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q=Q/4

q=Q/2

q=Q

None of these

Wave nature of particle was given by:

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Clemensen

Louis de Broglie

Laster H. Germer

Clinton S. Davisson

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these