Question # 1

The square of 0.4 is:

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Greater than 0.4

Smaller than 0.4

Equal to 0.4

None of them

An compared to solid matter, a crack or an air bubble allows:

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Great amount of X-rays to pass

Smallast amount of X-rays to pass

Very samall amount of X-rays to pass

Any of these

None of these

When a nucleus emits an alpha particles, its charge number decreases by

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3

2

6

5

In a container having water filled up to a height h, a hole is made in the bottom. The velocity of water flowing out of the hole is

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Independent of h

Proportional to h^1/2

Proportional to h

Proportional to h²

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

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45°

90°

135°

180°

Which of the following does not obey ohm's law?

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Copper

Al

Diode

None

Waves transport energy

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without transport energy

with matter

both of them

none of them

The angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is:

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2.5 sec

0.06 sec

15.7 sec

0.4 sec

Stoke;s law is not applicable when the speed of the object moving through a fluid is:

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Zero

Small

Large

None of these

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

The direction of induced current is always so as to oppose the cause which produces it. This is

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Lenz's law

Ampere's law

Faraday's law

Coulomb's law

None of these

The horizontal component of a force at an angle 60° with it is 50N. The value of force is

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43.3 N

50 N

100 N

120 N

The blood flow is laminar at

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Normal blood pressure

Systolic blood pressure

Diastolic blood pressure

High blood presure

A line which represents the direction of travel of a wave is known as:

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Spherical wavefront

Locus

Ray

Either B or C

A simple telescope is consists of

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One convex lens

Two convex lenses

Three convex lenses

None of these

The activity of a radioactive sample is 1.6 curie and half-life is 2.5 days. Its activity after 10 days will be:

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0.8 Curie

0.1Curie

0.4 Curie

0.16 Curie

A person A is going up in a balloon while another person is going down into a mine.Both are measuring the gravitational field.

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The field measured by both A and B goes on increasing.

The field measure by A Increases while the measured by B decreases

The field measured by A decreases while that measured by B decreases

The field measured by A decreases while that measured by B increases

In a diffraction fringes pattern the fringes are

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Equally spaced

Wider near the centre and narrower away from it

Narrower near the centre and Wider away from it

None of these

The SI unit of heat is:

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Calorie

Horse power

Joule

Watt

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

In cause of YDS experiment, the distance between adjacent bright fringes is given by

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Δy =λL/d

ΔY = L/λd

ΔY =λ/L

None of these

The half-life of a certain element is 3.5 days at STP. If the temperature is doubled and pressure is reduced to half then half-life of the same element will be:

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1.75 days

3.5 days

7 days

14 days

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