Question # 1

Minor but rapid change in atmospheric pressure cause:

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Poor condition

Intense condition

Windy condition

Pleasant condition

If 1N is force and body is displaced to 1m than work is :

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2 J

1 J

3 J

4 J

Forces on doubled arm spanner are called.

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Torque

Couple

Moment of force

Momentum arm

Glass and transparent polythene sheets allow radiations of wavelength to pass through them:

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Long

Short

Medium

All

The unit of acceleration is.

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ms-1

ms

ms^-2

ms²

A body has translatory motion if it moves along a.

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Straight line

Curved path

Line without rotation

Circle

____________ from sun are major source of energy on earth.

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Light

Radiation

Both a & b

None of these

Unit of Resultant force is:

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Nm^-2

N.m

Nm^-1

N

_____________ is centre from which its mass is equally distributed:

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Cebtre of mass

Centre of gravity

All of above

None

The source of energy that can be renewed are called:

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Renewable source

Non-renewable

They RAE Naturally found

None

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

Which is not an e.m.f source:

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Generator

Solar cell

Battery

Rheostat

Which is the most suitable means of reliable continuous communication between an orbiting satellite and Earth?

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Microwaves

Radio waves

Sound wave

any light waves

When 1 kg of Uranium -235 is fused then energy released is

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67 x 10¹⁰ J

67 x 10⁷J

67 J

7 J

Which device has two coils, primary and secondary?

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D.C. Motor

Transformer

A.C. genrator

a and b

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2Ω

4Ω

8Ω

12Ω

Which form of energy is sound:

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Electrical

mechanical

Thermal

Chemical

In OR operation inputs are connected as:

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Series

Parallel

Both series or parallel

None of these

For the emission of electrons from the tungsten filament the values of current and voltage are taken as:

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0.1 A and 2V

0.2 A and 4V

0.3A and 6V

0.4A and 8V

One joule per coulomb is called:

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Volt

Farad

Ampere

Tesla

When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is:

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The same as direction of field

Opposite the direction of field

Makes an angle of 45^owith the current

At right angle to both the field and the current.

An object is 14 cm is front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

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4.1 cm

8.2 cm

9.9 cm

20 cm

A convex lens acts as diverging lens if the object is placed at

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F

2F

Between F and 2 F

Within the F

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

The device used for measurement of liquid flow is.

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Manometer

Barometer

Hydrometer

Venturimeter

Kilo watt hour is the unit of

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Power

Energy

Force

Torque

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

When hot and cold water are mixed, the entropy.

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Decreases

Increases

Remain constant

Zero

The path followed by a projectile in known as its

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Range

Trajectory

Cycle

Height

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

According to Newton's formula, the speed of sound in air at STP is

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332 ,ms-1

340 ms-1

350 ms-1

280 ms-1

The ability of a body to do work is called its

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Force

Power

Capacity

Energy

The instrument which detects the instant as which the external pressure becomes equal to the systolic pressure is called.

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Manometer

Sphygmomanometer

Barometer

Stethoscope

e.m.f is the conversion of --------------- energy into electrical energy

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Chemical

Solar

Light

None of these

Unit of self inductance is

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Weber

Tesla

Henry

Farad

Internal frame is a frame is which

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1st law holds

2nd law holds

3rd law holds

Kelvin's law holds

An ordinary glass gradually softness into a paste like state before it becomes a very viscous liquid which is possible at

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900^oC

600^oC

800^oC

100^oC

Energy needed to produce an electron hole in solid state detector is.

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1 to 2 eV

3 to 4 eV

6 to 7 eV

8 to 9 eV

Force on a charged particle is zero when projected at angle with magnetic field.

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0 ^o

90^o

180^o

270^o

Which series lies in the ultraviolet region.

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Balmer series

Bracket series

Ptund series

Lyman series

At 0 K a piece of silicon is a

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Conductor

Semi-conductor

Insulator

All

A diode characteristics curve is a plot between

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Current and resistance

Voltage and time

Voltage and current

Current and time

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Lenz's law

Faraday's law

Ampere's law

None of these

The existence of positron was discovered in:

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1929

1928

1931

1933