Question # 1

Heat is the

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The energy in transit

Total kinetic energy of the molecules

The internal energy

Work done by the olecules

The best materials to protect a device from external magnetic field is

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Sot iron

Steel

wood

Plastic

Magnetic field lines.

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Are colosed

Are farthest at poles

Intersect each other

Do not pass in vacuum

One femtometre is equl to

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10^-15 m

10¹⁵m

10^-9m

10⁹m

SI unti of pressure is.

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Newton

Pascal

Infinite

Zero

It is more difficult to walk on a slippery surface than on a nonslipery one because of

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Lower weight

Increased friction

Reduced friction

High grip

The branch of Physics that deals with the particles such as neutrons and protons.

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Electricity

Plasma Physics

Nuclear Physics

Solid state Physics

Pressure of liquid in a container increase with

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Depth

Volume

Mass

Base

An object will continue its motion with constant acceleration until

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The resultant force is at right angle

The resultant fore on it begins to increase

The resultant force on it begins to decrease

The resultant force is at right angle to its tanggential velocity

Which of the following material is ferromagnetic

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Nickel

Copper

Alluminum

Silver

Ratio of milimeter to micrometer is

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1000 m

0.001 meter

1000

0.001

Who discovered the phenomenon of natural radioactivity?

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Henry Becurial

Merry Curi

Perry

Rutherford

The converter of digital to analogue signal is:

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ADC

DAC

DATC

DTC

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

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2 V

9V

18 V

36 V

In variable capacitor, dielectric medium is:

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Paper

Air

Mica

Ceramic

Electric potential is a quantity:

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Scalar

Vector

Base

All

The intensity of lawn mover is:

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10^-1 wm^-2

10^-2wm^-2

10^-1wm^-3

10^-3wm^-2

Which is not a hardware:

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CPU

Window

Keyboard

Mouse

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

Instrument used for detecting and testing the nature of charge on a body is called:

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Incubator

Spectroscope

voltmeter

electroscope

in a dry cell, chemical energy changes into:

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mechanical energy

electrical energy

potential energy

kinetic energy

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

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0 V

30 V

45 V

60 V

If r = 5 m and f = 4 N are along same direction, them torque is

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20 Nm

5 Nm

10 Nm

Zero

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

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Small

Large

Zero

None

Rate of change of velocity is called

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Speed

Acceleration

Displacement

Torque

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

the distance covered during one vibration of an oscillating body in terms of amplitude 'A' is

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A/2

A

2A

4A

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

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 profile of periodic waves generated by a source executing S.H.M is represented by a.

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Circle

Sine curve

Tangent curve

Cosine curve

A layer over the central core of the jacke is called.

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Jacket

Plastic

Cladding

Rubber

The effective way to increase the sensitivity of moving coil galvanometer is.

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Increase the area of coil

Increase the number of turn

Increase the magnetic field

Increase the value of constant C

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

The device in the circuit that consume electrical energy are known as.

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Dissipaters

Generator

Load

Motors

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

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

The main reason for world wide use of A.C is because:

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It is very high power

It can be transmitted over long distance

It is cheaper to use

ALl of above

In RLC circuit the energy is dissipated in

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R only

R and L

R and C

L and C

The sensitivity of galvanometer directly depends upon

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Magnetic field

Area of coil

Both a and b

None of a, b, c

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

For which material medium, force between two charged particles is maximum.

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Ammonia

Germanium

Mica

Teflon

For Paschen series, the value of 'n' starts from

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2

4

6

8