Question # 1

The scientist who notice that all the freely falling objects hae same acceleration.

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Einstein

Galileo

Coulomb

Newton

Co-efficient of friction between iron and iron is:

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1.0

0.62

0.9

1.2

Latent heat of fusion of water is:

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3.36 x 10¹⁰ Jkg^-1

93.6 x 10¹⁰Jkg^-1

3.36 x 10⁵Jkg^-1

None of these

The example of bad conductor is:

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Wool

Copper

Gold

Iron

PQ & RS are 2 parallel forces moving in same direction than they are called ............... forces.

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Like parallel

Unlike

Parallel

Nil

Which of the following is an insulator?

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Wood

Glass

Plastic

Steel

The number of forces that can be added by head to tail rule are

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2

3

4

Any Number

Kinetic energy of the molecules depends on its:

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Temperature

Surface are

Density

Volume

Heat radiation obey the laws of:

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Absorption

Reflection

Both A and B

None

Prefix naming as Giga has a symbol.

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M

G

m

g

S.I unit of force is:

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N

Ns

s

None

1 GB = ______________ Megabytes.

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1022

1023

1024

1025

The force applied on the mass attached with a spring is represented by:

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f_a

f_c

f_ext

f_s

If the change of current in a circuit induces a current in another circuit, this phenomena is known as:

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Self induction

Mutual induction

Electromagnetic induction

None mutual induction

Which form of energy is sound?

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Electrical

Mechanical

Thermal

Chemical

The magnetic field of a solenoid resembles as:

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Iron wire

U-shape magnet

Bar magnet

Point charge.

If we double the distance between two charges, what will be the change in the force between them?

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Half

Double

One fourth

Four times

The S.I unit of Spring constant is:

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Nm

N

Nm-1

Ns

The reason carbon dating work is that.

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Plants and animals are such strong emitters of carbon 14

After a plant or animal dies, it stops in fresh carbon

There is so much non radioactive carbon dioxide in the air

When a plant or animal dies.

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

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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

The half of carbon 14 is

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5720 years

5730 years

5740 years

5750 years

Electric potential and e.m.f.

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are the same terms

are the different terms

have different units

both b and c

The terminal velocity of a droplet falling down under gravity is directly proportional to the square of

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Its density

Its radius

Its viscosity

Its elasticity

The centre of Newton's fringe is dark due to.

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Destructive interference

Diffraction

Constructive interference

Polarization

The centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

A force of 10N makes an angle 30o with y axis. Then magnitude of x -component is.

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5 N

8.66 N

10 N

Zero

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

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0 %

14 %

15 %

16 %

2 radian = ____

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2 m

4 m

57.3 m

114.6 m

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

The focal length of a concave lens is always

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+ve

-ve

Zero

None of these

The distinguish between transverse and longitudinal wave_______ is used.

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Refraction

Interference

Diffraction

polarization

The direction of induced current is always so as to oppose the change which causes the current is:

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Faraday's law

Lenz's law

Ohm's law

Kirchhoff's 1st rule

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.

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0.1 J

10 J

100 J

1000 J

Half life of Uranium -239 is

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26.5 minutes

24.5 minutes

25.5 minutes

23.5 minutes

The existence of positron was discovered in:

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1929

1928

1931

1933

The sensitivity of galvanometer is given by

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CAN/B

C/BAN

BAN/C

BN/CA

A charged particle having charge 'q' is moving at right angle to magnetic field. The quantity which varies is.

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Speed

Kinetic energy

Path of motion

angular velocity

In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to:

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Infinite energy

Maximum energy

Minimum energy

Zero energy

Commutator was invented by:

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William bills

William Gates

William tells

William Sturgeon

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above