Question # 1

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

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108 g

10.8 g

0.8 g

108/0.8 g

Neutron was disvovered by:

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Rutherford in 1920

Chadwick in 1922

Bohr in 1913

Compton in 1927

None of these

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

The work done in moving a body between two points in a conservation field is independent of the:

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Direction

Force applied

Path followed by the body

Power

The concept of direction and position are purely

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absolute

relative

absolute or relative

none of these

Significant figures in 0.0010 are:

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Four

Three

Two

One

The L-C parallel circuit the capacitor draws a

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leading current

lagging current

main current

none of these

An intertial frame of reference is a frame of reference which is

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at rest

moving with uniform velocity

either at rest or moving with uniform velocity

none of these

A curie represents a very strong source of

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α-particle

β-particle

γ-particle

none of these

Tesla is the unit of

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Magnetic induction or flux density

Magnetic flux

Self inductance

None of these

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved

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1.92 N

19.2 N

12 N

0.192 N

Coplanar forces are those, which act on a

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Single plane

All planes

Common plane

None of these

In a charged capacitor the energy is stored in

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Both in positive and negative charges

Positive charges

The edges of the capacitor plates

The electric field between the plates

In YDS experiment, data given isλ=500 nm, d=1 mm, L=100cm,∆y come out to be:

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0.5 cm

0.5 mm

0.5 nm

0.5 m

Which of the quantity is dimensionless:

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Strain

Stress

Modulus of elasticity

Work

Entorpy

If a lens is cut into two piece perpendicular to the principal axis and only part is used the intensity of the image:

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Remains same

1/2 times

2 times

Infinite

The cause of power loss in optic fibre is

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Absorption

Scattering

Dispersion

All

The high-tensile steel used to support the roadway of a suspension bridge breaks under a stress of 2 x 10⁹Pa. Find the minimum cross-sectional area for a cable if it is to support a load of mass 2 x 10⁵kg.

(g = 10 N kg^-1)

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10^-2m²

10^-1m²

10^-4m²

10^-3m²

A convex lens has focal length F.An object is placed at P then

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Image is formed at + ∞ and is real

Image is formed at + ∞ and is virtual

Image is formed at + ∞ and is real

Image is formed at + and is virtual

Curie temperature is a point where:

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Diamagnetism changes to paramagnetism

paramagnetism changes to Diamagnetism

Ferromagnetism changes to paramagnetism

paramagnetism changes to Ferromagnetism

The ratio of size of the image to the size of the object is called

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Resolving power

Magnification

Power

None of these

Acceleration of a body is negative if the velocity of the body is

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constant

increasing

decreasing

none of them

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