Question # 1

1 N ___________

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1 kgms^-2

1 kg ms^-1

ms^-2

All

That force which produces an acceleration of one metre per second per second in a body of one kilogram mass is called

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1 joule

1 newton

1 watt

1 ampere

The bad conductor of heat is:

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Iron

Copper

Air

Aluminum

When the cyclist stop pedalling, bicycle stops due to :

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Friction

Momentum

Weight

Mass

Centripetal force always acts _________ to the motion:

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Opposite

Parallel

Perpendicular

Upward

S.I unit of specific heat is:

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Jkg^-1 K^-1

J^-1kg^-1K^-1

JkgK

Jkg^-1K

The density of a substance can be found with the help of

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Pascal's law

Hooke's law

Archimedes principle

Principle of floatation

If the velocity of moving body in circle is doubled, then its centripetal force is

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Double

Half

Four times

Remain

Dogs sweat through:

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Tongue

Legs

Skin

Glands

2nd law of motion is stated as:

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F=m/a

F=ma

F=a/m

F=ma²

More radiation is reflected by the surface.

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White

Coloured

Black

Rough

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral charge

Repels a neutral chage

A transformer has 100 turns in its primary and 500 turns in secondary coil. If 6 volts D.C is applied across its primary, the voltage induced across its secondary coil will be:

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0 volt

30 volts

45 volts

60 volts

the time period of body attached to spring depend on:

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mass

gravitational constant

length

amplitude

One coulomb is equal to charge of ________ electrons.

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6.25 x 10^-19

6.25 x 10¹⁹

6.25 x 10¹⁸

6.25 x 10^-18

Which of the following characteristics of a wave is independent of the others:

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speed

frequency

amplitude

wavelength

Resistance of conductor is directly proportional to:

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Length

Pressure

Area

All of these

The unit of electrical energy is:

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Joule

Watt

Volt

Electron volt

The two inputs of a NAND gate are A and B. Its output would be zero when:

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A = 0, B = 0

A = 1, B= 0

A = 1 , B = 1

A = 0 , B = 1

1 bel=

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0.1 dB

10 dB

100 dB

0.01 dB

How Galvanometer is connected in circuit to detect current:

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In series

In parallel

Fixed

Variable

The maximum displacement from mean position is called:

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Maximum height

Time period

Amplitude

Intervel

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

The first person who attempted to measure the speed of light was.

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Michelson

Hygen's

Galileo

Ability

For angular momentum of system to remain constant, external torque should be.

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Small

Large

Zero

None

Which is the example of vector quantity

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Torque

Speed

Density

Work

100 radians are equal to.

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57.3^o

75.3^o

573^o

5730^o

The direction of angular velocity of along the

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Tangent at that point

Axis of rotation

Radius towards the centre

Radius away from the centre

A fog droplets are in freely falling condition,. the ratio of their radii is 2:3, the ratio of their terminal velocities will be.

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2:3

4:6

4:9

9:4

The maximum velocity necessary to put a satellite into orbit is

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7.1 kms-1

7.3 kms-1

7.9 kms-1

8,9 kms-1

The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

In rotational motion the analogous of mass is

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Angular acceleration

Torque

Moment of inertia

Angular momentum

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

The mutual inductance of the coils depends upon.

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Stiffness of the coils

Density of coils

Material of coils

Geometry of the coils

The temperature at which, semiconductor behaves as insulators:

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10k

0k

237k

None of above

In Millikan's oil drop experiment a charged particle of mass 'm' is in equilibrium in an will

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Zero

g/2

g

2g

Heat sensitive resistors are called.

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resistors

Capacitor

Thermistors

Inductors

Three resistors of resistance R each are combined in various ways, Which of the following cannot be obtained?

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3 RΩ

2R /4Ω

R/3Ω

2R /3Ω

Rutherford performed on experiment on a nuclear reaction in:

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1921

1981

1927

1932

Which consumes small power.

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Inductor

Resistor

Motor

All of these

Sensitivity of a galvanometer can be increased by

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Decreasing the value of torsional couple

Decreasing number of turns

Decreasing area of plane of coil

Decreasing magnetic field

The peak value of alternating current is 5√2 A. The mean square value of current will be:

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5A

2.5A

5√2A

5²

In current carrying long solenoid the magnetic field produced does note depend upon

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of above

The materialization of energy take place in the process of.

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Photo electric effect

Compton Effect

Pair production

Annihilationof matter