Question # 1

If the distance between two charges is doubled, the force between them will become

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Double

Half

Three times

One fourth

One third

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

Nucleon means:

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Only electrons

Only neutrons

Only protons

Both (A ) and (C)

Both (B) and (C)

The unit of induced emf is:

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Volt

Nm/As

Joule coul^-1

Both A and C

All of these

Dimension of mass is written as:

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M

[M]

(M)

[m]

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

Neutron was discovered by

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Curie

Roentgen

Chadwick

Rutherford

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

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0.1 m

0.2 m

0.98 m

Full length of the capillary tube

According to Rutherford atomic model, the positive charge in an atom

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is concentrated at its centre

is in the form of positive electron at same distance from its centre

is spread uniformly through its volume

none of these

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

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1.66 x 10^-29m

1.74 x 10^-10cm

17.4 x 10^-6m

1.74 x 10^-10m

The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:

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5 rad/sec²

-10 rav/sec²

-10 rad/sec²

-5 rav/sec²

If a ball comes back to its starting point after bouncing off the wall several times, then its

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total displacement is zero

average displacement is zero

none of them

both of them

Most widely used optical fibres are those which propagate light by

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total interval reflection

continuous refraction

both of them

none of them

Which of the following is the smallest unit?

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Millimeter

Angstrom

Fermi

Metre

The ratio of the diameter of two convex lenses is the ratio of their focal lengths

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Greater than

Less than

Equal to

None

A force of 10N is acting along y-axis.Its component along x-axis is

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10N

20N

100N

ZeroN

Can a vector have a component greater than the vectors magnitude ?

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yes

No

yes in some cases

None of these

The instantaneous velocity is define as the limiting value ofΔd/Δtwhen the time intervalΔt approaches to

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zero

maximum

minimum

infinity

The medium in which speed of light is the same in all directions is called:

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Homogeneous

Heterogeneous

Non-homogeneous

Free space

For a quantity to be a vector it must has/have

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Magnitude and direction

Obey law of vector addition

Both (a) and (b)

Only (a)

How does the Young's modulus vary with the increase of temperature?

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Decrease

Increase

Remains constant

First increases and then decreases

In n-type substances the minority carriers are

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Holes

Electrons

Neutrons

None

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