Question # 1

Expansion in one meter steel is:

Choose an answer

1.0 mm

0.1 mm

1.0 mm

1.3 mm

Distance covered by freely falling downward body in first second.

Choose an answer

5 m

29.4 m

10 m

19.6 m

Length of a rod is L∘ on temperature T∘. After heating upto temperature T, its length L becomes

Choose an answer

L = L∘ (1 + αΔT)

L = L∘ (1 + ΔT)

L = L∘ (1 - αΔT)

L = L∘ (1 -ΔT)

Central heating systems in buildings operate by

Choose an answer

Conduction

Radiation

Convection

Condensation

At night , the air from land to begins towards sea called:

Choose an answer

Land breeze

Sea breaze

Both A and B

Radiation

If K = 150 N/m and elasticity is 0.20 m than:

Choose an answer

F = 30N

F= =31N

F = 32N

F = 29N

The unit of momentum is:

Choose an answer

kgms^-2

kgms^-1

Ns^-1

None of these

A force of 20 N is acting on a body of mass 8 kg,Its acceleration will be

Choose an answer

2.5 ms-2

4.5 ms-2

5.5 ms-2

3.5 ms-2

Latent heat of fusion is denoted by:

Choose an answer

H1

Hm

Hv

Hf

To every action there is always an equal but __________ reaction:

Choose an answer

Same

Parallel

Opposite

Equal

Friction is due to

Choose an answer

Roughness

Shape

Smoothness

None

If a neutral body is brought near to the electroscope its leaves:

Choose an answer

Diverge

Contract

Shut

Remain in normal position

A dielectric must be:

Choose an answer

Resistor

Insulator

Good conductor

Semi conductor

The direction of induced e.m.f. in a circuit is in accordance with conservation of.

Choose an answer

Mass

Charge

Momentum

Energy

Number of poles in a magnet is:

Choose an answer

One

Two

Three

Unlimited

Who discovered Electromagnetic induction?

Choose an answer

Michael Faraday

Flemiing

Ohm

Coulomb

The wave properties

Choose an answer

Reflection

Refraction

Diffraction

All of these

Electric potential and e.m.f.

Choose an answer

are the same terms

are the different terms

have different units

both b and c

The output of a two input NOR gate is 1 when:

Choose an answer

A is 1 and B is 0

A is 0 and B IS 1

Both A and B are 0

Both A and B are 1

Who discovered the phenomenon of natural radioactivity?

Choose an answer

Henry Becurial

Merry Curi

Perry

Rutherford

Formula for time period of spring mass system is represented by:

Choose an answer

T = 2π√m/k

T = 2π √k/m

T = 1/2π√k/m

T = 1/2π√m/k

Power of convex lens is 10 D. Its focal length is:

Choose an answer

100 m

10 m

1 m

0.1 m

The dimensions of work are.

Choose an answer

[MLT-1]

[MLT-2]

[ML2T-2]

[MLT]

The subtraction of a vector is equivalent to the addition with

Choose an answer

Same direction

Perpendicular direction

Reversed direction

All of these

In reversible process the entropy of system.

Choose an answer

Remain constant

Decrease

Increase

Becomes zero

The SI unit of power is

Choose an answer

Joule

Newton

Watt

Kilowatt

In order to produce beats, the two sound waves should have.

Choose an answer

The same amplitude

Slightly different amplitude

The same frequency

slightly different frequencies.

What would encourage trade between two countries

Choose an answer

Different tax system

Frontier checks

National currencies

reduced tariffs

The time period of an oscillating mass spring system is 10 second. If mass attached to spring id doubled then time period becomes.

Choose an answer

10 sec

20 sec

5 sec

None of these

The Detector in Photo phone is made up of.

Choose an answer

Cadmium

Germanium

Selenium

Silicon

Total confined light is obtained by

Choose an answer

Total internal reflection

Refraction of light

Diffraction

Polarization

The error in speed of sound calculated by Newton at STP is about.

Choose an answer

0 %

14 %

15 %

16 %

A diatomic gas molecules has

Choose an answer

Translational energy only

Rotational energy only

Vibrational energy only

All translational, Rotational and vibrational energy

The activity of radioactive sample

Choose an answer

Is constant

Increases with time

Decreases linearly with time

Decreases exponentially with time

When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as.

Choose an answer

Photoelectric effect

Piezo electric effect

Thermionic emission

Secondary emission

The capacitance of a capacitor depends upon.

Choose an answer

Thickness of plates

Charges on the plates

Voltage applied

Geometry of the capacitor

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

Choose an answer

900^oC

600^oC

800^oC

100^oC

The sum of positive and negative peak value called.

Choose an answer

R.M.S. value

P-P value

Peak value

Average value

The special theory of relativity based on.

Choose an answer

One postulate

Two postulates

Three postulates

Four postulates

A cable breaks if stretched by more than 2mm. It is cut into two equal parts. How much either part can be stretched without breaking?

Choose an answer

25 m

1mm

2mm

0.5 m

If there is no fourth band, tolerance is shows as

Choose an answer

10%

The circuit which compares the two voltages is.

Choose an answer

LDR

Sensor

Comparator

Logic gate

The quantity of U in the naturally occurring uranium is.

Choose an answer

0.2%

0.3%

0.7%

0.4%

Lenz's law is a consequence of the law of conservation of

Choose an answer

Charge

Momentum

Energy

Angular momentum