Question # 1

The rate change of area expressed is expressed in:

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m²s^-1

ms^-2

m²s^-2

ms^-1

None of these

For maximum linear distance of travel, a projectile must be fired at an angle of

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0°

45°

90°

60°

The magnetic field in the middle of a solenoid due to current is

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weak

strong and uniform

none-uniform

zero

The unit of resistivity is

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ohm

ohm-m²

ohm-meter

ohm-m^-1

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

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1.46 m sec^-1

2.44 m sec^-1

3.42 m sec^-1

4.43 m sec^-1

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

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9 x 10⁵V

9 V

8 x 10⁶V

80 V

Selenium is:

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An insulator

A conductor

Both A and B

Excellent conductor

None of these

The value of threshold frequency for different metals is

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different

same

may be different or may be same

none of these

Work is a always done on a body when

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A force acts on it

It moves through certain distance

None of A or B is correct

Both A and B are correct

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

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negative charges

positive charges

protons

electrons

Momentum is a parameter associated with

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wave motion

particle motion

neither wave nor particle motion

none of these

The ratio of shearing stress/shearing strain is called as

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modulus

Pascal modulus

Hooke's modulus

shear modulus

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

Wavelength of light, on the average, is given by:

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10^-14m

10^-10m

10^-6m

10^-4m

Plane microwaves are incident on a long slit having a width of 5 cm.The wavelength of the microwaves if the first minima is formed at 30° is

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25 cm

5 cm

2.5 cm

5 mm

The capacity of a condenser when a dielectric is placed in between its plates

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Increases

Decreases

Doest not change

The ratio of electro static force to the gravitational force between them is of the order of

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10³⁶

10³⁸

10⁴⁰

10⁴²

The maximum range of the projectile is the horizontal distance covered is

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Maximum

Distance

Minimum

None of these

The synchronous satellites are very useful for

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Worldwide communicatioin

Weather observations

Navigation

All of these

Planck's constant has the dimensions of:

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Energy

Momentum

Frequency

Angular momentun

A body is dropped from a tower with zero velocity reaches ground in 4 seconds.The height of tower is about

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80 m

20 m

160 m

40 m

The centripetal acceleration is supplied by

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Applied force

Gravity

Initial velocity

None of these

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