Question # 1

A point charge Q is placed at the mid-point of a line joining two charges 4q and q. if the net force on charge q is zero. then Q must be equal to

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-q

+q

-2q

+4q

Electrons in the atom are held in the atom due to

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Coulomb forces

Nuclear forces

Gravitational forces

Van der Waal's forces

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

The number of translation degrees of freedom for a diatomic gas is

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2

3

5

6

The percentage errors in the measurements of mass and speed are 2% and 3% respectively. How much estimate of the kinetic energy obtained by measuring mass and speed

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11%

8%

5%

1%

The structure of solids is investigated by using

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Cosmic Rays

X-rays

Intra red Radiation

y-rays

A conducting wire is drawn to double its length Final resistivity of the material will be

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Double of the original one

Half of the original one

One-fourth of the original one

Same as original one

There are discrete energy levels in atoms. It was first experimentally demonstrated by

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Rutherford's experiment

Frank Hertz experiment

Marsden's experiment

Sommerfield experiment

Quantity that remains unchanged in a transformer is

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Voltage

Current

Frequency

None of these

The modulus of rigidity of a liquid is

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Zero

1

Infinity

A value not one of those mentioned above

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