Question # 1

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

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Protactinium

Actinium

Uranium

Radium

Redon

Work is always done on a body when:

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A force acts on it

It moves through certain distance

None of A and B is correct

Both A and B is correct

Huygen principle is used to determine:

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Speed of light

Location of wavefront

About polarized or unpolarized light

None of them

The SI unit of magnetic induction is

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Weber

Weber/meter

Henry

Tesla

The SI unit of spring constant is identical with that of

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Force

Surface tension

Pressure

Loudness

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

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heat capacity

specific heat capacity

specific heat at constant volume

specific heat at constant pressure

Electric flux is:

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Cross product of two vector

Dot product of two vectors

A vector quantity

A scalar quantity

Both (B) and (D)

If electric and gravitational force on an electron in a uniform electric field will be

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E=mg/q

E=q/mg

E=,g/q

E=qg/m

Electron gun consist of

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three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

Blood pressure is measured by the instrument

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stethoscope

sphygmomanometer

barometer

none of them

A source of a magnetic field is:

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An isolated magnetic

A static electric charge

A moving electric charge

None of these

The points on a Huygen's wave front which sends out secondary wavelets are also

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Source

Source of secondary wavelets

Coherent sources of light

None of these

If d = 0.25 cm Y = 0.059 cm L = 100 cm m = 2 then λ is equal to

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567 nm

569 nm

590 nm

596 nm

For assessment of total uncertainty when added or subtracted the absolute uncertainties are

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Multiplied

Divided

Added

Subtracted

Huygen's principle is used to study the

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formation of wavefronts

propagation of wavefronts

nature of light

speed of light

The fundamental unit of the quantity of matter is

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Kg

Mol

Gm

Meter

Two forces of 12 N and 8 N act upon a body.The resultant force on the body has a maximum value of:

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4 N

0 N

20 N

8 N

In light waves, the components of electric and magnetic fields are

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parallel to each other

anti-parallel to each

right angle to each other

none of them

The temperature below which materials are superconductor is called as:

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Kelvin temperature

Critical temperature

Curie temperature

none of these

Two forces 3 N and 2 N are at an angle 0 such that the resultant is R.The first force is now increased to 6 N and the resultant becomes 2R.The value of θ is

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30°

60°

90°

120°

If Rx is positive and Ry is negative, the resultant lies the fourth quadrant and its direction is

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θ = 180 + Φ

θ = 360 + Φ

θ = 360 - Φ

None of these

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