Question # 1

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

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Each have same number of molecules

Don't have same number of molecules

Can't be predicted

None

Victor de-Brogile received the Nobel prize in physics in

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1925

1929

1932

1935

The force applied on unit area to produce any change in the shape, volume or length of a body is known as

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strain

elasticity

stretching

stress

The sum of positive and negative peak values is called:

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Instantaneous value

Peak value

Rms valuie

Peak-to peak-value

None of these

CRO deflects the beam of

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proton

a-particle

electron

neutron

The phenomenon of generation of induced emf is called

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Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both (A) and (D)

Rate of decay is actually described by.

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Half line

Decay constant

Mean life

Total life

None of these

If a simple pendulum is shifted from karachi to K-2 cliff, its time period

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remains the same

decreases

increases

none of them

A potential barrier of 0.7 V exists across p-n junction made from:

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Germanium

Silicon

Arsenic

Gallium

Indium

Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at

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125 K

25 K

263 K

163 K

In a transistor, the central region is called

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collector

emitter

base

none of them

When the density is constant for the steady flow of incompressible fluid equation of continuity becomes

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ρ₁A₁V₁ = ρ₂A₂V₂

ρ₁m₁A₁V₁ = ρ₁m₁A₂V₂

A₁V₁ = A₂V₂

None of these

The critical temperature Tc for Aluminium is

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2.1 K

1.1 K

1.18 K

1.19 K

A ball is thrown with a speed of 30 ms^-1in a direction 30° with the ground. What is its vertical height?

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115 m

1.15 m

11.5 m

0.115 m

The dimensions of torque is

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[MLT^-2]

[ML²T^-2]

[ML²T^-1]

[MLT]

The magnifying power of a compound microscope can be increased if we use objective lens of

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Large focal length

Small focal length

Same focal length

None of these

In Michelsion's interoferometer, if the moveable mirror is moved through a distance 0.05 mm and 500 finges are observed, then the wavelength of light used is

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1 x 10^-7m

2 x 10^-7m

1.5 x 10^-7m

1 x 10^-8m

Once heat is transferred to an object, it is converted into the

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Entropy of the object

Internal energy of the object

Temperature of the object

None of these

There is a regular arrangement of molecules in

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amorphous solids

polymeric solids

crystalline solids

none of these

One micron is equivalent to

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10^-4m

10^-6m

10⁴m

10⁶m

In projectile motion when a body is projected upward it must have

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Initial velocity

Angleθ<90°

Falling under gravity

All of these

The systolic blood pressure comes when

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Vessel collapse

Cutting off the blood flow

None of these

All of these

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