Question # 1

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h. His average speed will be

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40 km/h

48 km/h

50 km/h

60 km/h

A body moving in circular motion with constant speed has

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Constant velocity

Constant acceleration

Constant kinetic energy

Constant displacement

At 0°K which of the following properties of a gas will be zero?

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Kinetic energy

Potential energy

Vibrational energy

Density

The nuclear model of atom was proposed by

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J.J Thomson

E. Rutherford

Neil Bohr

Summerfield

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

The dot product of two vectors is negative when

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They are parallel vectors

They are anti-parallel vectors

They are perpendicular vectors

None of the above is correct

Which of the following is a scalar quantity?

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Density

Displacement

Torque

Weight

The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

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7.20 N

11.25 N

22.50 N

45.00

Which of the following is not thermo dynamical function?

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Enthalpy

Work done

Gibb's energy

Internal energy

As the electron in Bohr orbit of hydrogen atom passes from stat n = 2 to n = 1, the kinetic energy K and potential energy U change as

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K two fold, U also two fold

K four fold, U also four fold

K four fold, U two fold

K two fold, U four fold

The number of turns in the primary coil of a transformer is 200 and the number of turns in the secondary coil is 10. If 240 volts ac are applied to the primary, the output the secondary will be

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48A

24V

12V

6V

Mechanical waves on the surfaces of a liquid are

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Transverse

Longitudinal

Torsional

both transverse and longitudinal

For obtaining appreciable extension, the wire should be

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Short and thin

Long and thin

Short and thick

Long and thick

At constant volume temperature is increased. Then

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Collision on walls will be less

Number of collisions per unit time will increase

Collisions will be in straight lines

Collisions will not change

Absolute temperature can be calculated by

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Mean square velocity

Motion of the molecule

Both A and B

None of these

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is:

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Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

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