Question # 1

The value of 'g' is greater at:

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Moon

Hills

Sea leavel

Desert

In measurement 1.032 numbers of significant figure are.

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1

2

3

4

Falls ceiling is done to:

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Lower the height of ceiling

Keep the roof clean

Cool the room

Insulate the ceiling

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

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F = 30N

F= =31N

F = 32N

F = 29N

The machine which use unequal masses to find the value of "g" is ________

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Free fall apparatus

Atwood machine

Pulley

None

A string is stretched by two equal and opposite forces 10 N each. The tension in the string is

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Zero

5N

10N

20N

Specific heat of glass

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780 Jkg^-1K^-1

800 Jkg^-1K^-1

840 Jkg^-1K^-1

880 Jkg^-1K^-1

The net torque acting on a rotating body with uniform speed is:

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0

1

2

5

SI unit of pressure is pascal, which is equal to:

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10⁴ Nm^-2

1 Nm^-2

10²Nm^-2

10³ Nm^-2

The ratio of output to input is called:

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work

Efficiency

Force

All of above

The study of internal structur eof Earth is called.

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Atomic Physics

Plasma Physics

Geo physics

Nuclear Physics

If the distance is nspring is 'x' of mass 'm' attached with a spring then restoring force is:

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F =ma

F =kx

F = mx

F= m/a

Unlike charges always:

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Repel each other

Attract each other

Sometimes repel and attract each other

Both A and B

What is the voltage across a 6Ω resister when 3A current passes through it?

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2V

9V

18V

36V

The filament of an electric bulb is made of:

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Nickel

Aluminium

Tungsten

Carbon

Optical fibers work on the principle of:

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Refraction

Reflection

Total internal reflection

Diffraction

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

In A.C. generator flux will be zero if coil is to the field.

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90^o

45^o

Parallel

Inclined

That period in which voltage repeats its value in equal intervals is called:

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cycle

Time period

Frequency

Amplitude

1.6x10^-19 J= :

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1F

1N

1eV

A converging lens becomes a magnifying glass when an object is placed:

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Outside of focal length

Inside the focal length

Equal of focal length

At double of focal length

The index of refraction depends on:

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The focal length

The speed of light

The image distance

The object distance

What would encourage trade between two countries

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Different tax system

Frontier checks

National currencies

reduced tariffs

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

The sum of two or more vectors will be a single vector called

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Component vector

Position vector

-ve vector

Resultant vector

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

The artificial satellites are held in orbits by

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Gravitational force

Electric force

Magnetic force

All of these

If the are of a circle equals its radius, then the angle subtended at the center will be

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1 degree

One rotation

One radian

Half rotation

Average translational K.E. of molecules for an ideal gas is given as

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1/2 KT

KT

2/3 KT

3/2 KT

When sound waves enter in different medium, the quantity that remains unchanged is.

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Intensity

Speed

Frequency

Wave length

The tides raise in the sea roughly

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Once a day

Twice a day

Three a day

Four time a day

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

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Jacket

Plastic

Cladding

Rubber

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

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0.5

5

10

20

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

Kx -Xrays are produced due to transition of electron from.

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K to L shell

L to K shell

M to K shell

M to L shell

Power dissipation in A.C circuit is expressed as:

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P =I_rms x V_rms Sinθ

IxVCosθ

I_rmsxV_rmsCosθ

I_rms x V_rms Sin2θ

Nuclear fission chain reaction is controlled by using.

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Cadmium rods

Iron rods

Platinum rods

Steel rods

Which one of the following is polymeric solids

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Glass

Nylon

Copper

Zinc

SI unit of hennery which is.

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VSA-1

VS-1 A

VS-1A-1

VSA

substance which undergo plastic deformation until they break are known as.

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Brittle substances

Ductile substance

Non magnetic substance

Magnetic substance

In a pure inductive A.C. circuit the current.

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Lags behind voltage by 90 ^o

Leads the voltage by 90 ^o

In phase with voltage

Leads the voltage by 270 ^o

Photo electrons are emitted y using visible light when the metal is.

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sodium

Copper

Nicked

Cobalt

Light of 4.5 eV is incident on a Cesium surface and stopping potential is 0.25 eV, maximum K.E. of emitted electron is.

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4.5 eV

4.25 eV

4.75 eV

0.25 eV

The first atomic reactor was introduced by

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Currie

Enrico Fermi

Newton

Bohr