Question # 1

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

Neutron was suggested to be in the nucleus by:

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Rutherford in 1920

Bohar in 1913

Dirac in 1928

Anderson in 1932

None of these

The magnifier forms a virtual image of the object at:

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Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

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Increases

Decreases

Remain unchanged

Becomes infinite

The phenomenon of generation of induced emf is called:

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Electrostatic induced

Magnetic induced

Electromagnetic induced

Electric induced

Both A and C

The example of mechanical wave is

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waves in ropes

waves on water surface

waves in air

all of them

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

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1

0.2

2

0.1

The magnitude of the force producing an acceleration of 10 m/sec2 in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

The product of the pressure and volume of an ideal gas is

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

The restoring force is always directed towards:

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Rest position

Equilibrium position

Mean position

All of them

By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second ( g=10m/s²)

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58.8 m/s

49 m/s

65 m/s

19.6 m/s

The formula for the volume of a sphere is

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4 π²

4/3 π³

4/3 π²

5/3 π³

The ratio of diameters of two convex lenses is ______ the ratio of their focal lengths

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Greater than

Less than

Equal to

Square of

The magnitude of torque is equal to the product of the force and the moment arm. The moment arm is

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The distance between the point and the point of the action of the force

The maximum distance between the pint and the line of action of the force

The minimum distance between the pivot point and the line of action of the force

All of these

The kinetic energy of a body becomes four times its initial value.The new linear momentum will be

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Four times the initial value

Thrice the initial value

Twice the initial value

Same as the initial value

The biological sciences deal with the

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Living things

Non-living things

Both

None of these

The ballistic missiles are useful for

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Short ranges

Long ranges

Medium ranges

None of these

The kinetic energy of a body is four times its momentum its velocity is

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2ms^-1

4ms^-1

8ms^-1

16ms^-1

Area between the velocity time graph and time axis is equal to

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Speed of object

Distance covered

Velocity of the object

Acceleration

The internal energy is similar to the

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Gravitational potential energy

Kinetic energy

Mechanical energy

None of these

A tritium and alpha particle enter the magnetic field with same kinetic energy, what will be the ratio of their radii?

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3:4

√3: 1

√3: 4

√3:√2

Sun has elliptical shape when it rises and sets due to

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Refraction

Reflection

Scattering

Dispersion

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