Question # 1

A particle is moving along a circular path with uniform speed. Its projection will execute ___along the _____ of the circle:

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Circular motion, circumference

Vibratory, chord

SHM, diameter

SHM, circumference

Neon gas have three isotopes whose atomic numbers are

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20, 24 , 23

20, 21 , 22

20, 19 , 21

none of these

Which of the following represents an electric current?

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C^-1

CS^-1

J.S^-1

dynes^-1

In the formula P = N₀KT, N₀denotes:

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Number of molecules per unit per volume

Number of moles

Number of molecules

None of these

As the light shines on the metal surface, the electrons are ejected

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slowly

instantaneously

either of these

none of these

Pair production take place when energy ofγ-rays photon is

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equal to 1.02 Mev-

greater than 1.02 Mev

less than 1.02 Mev

none of these

The number of different crystals systems based on the geometrical arrangement of their atoms and the resultant geometrical structure are

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5

7

9

14

Which of the following is most suitable as the core of transformer

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Soft iron

Alinco

Steel

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

In a transistor, if the central region is p-type then this type of transistor is known as

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p-n-p transistor

n-p-n transistor

either of these

none of these

A mass of 5kg moves with an acceleration of 10m s^-2force applied is

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10N

50N

2N

20N

A non-uniform beam of weight 50 N is 2 m long and is supported on a pivot situated in the exact middle of the beam. The centre of gravity of the beam is 0.5 m ot the right of the point where the pivot touches the beam. What weight has to be added to the left side of the beam so that the beam stays perfectly balanced (in equilibrium)?

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25 N

12.5 N

50 N

Not enough information to answer the question

Spectrum of sun consists of

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Bright lines

Dark lines

Bright bands

Dark bands

Debye is the unit of

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Magnetic dipole moment

Electric dipole moment

Density

RMS velocity

A capacitor of capacity 1 μF is charged to 1 kV.The energy stored in J

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5

0.5

0.005

50

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

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Decreases

Increases

No change

May increase or decrease

Diameter of the atom is of the order of

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10^-10m

10^-12m

10^-15m

10^-9m

Dimensions of impulse are similar to the dimensions of

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torque

work

force

momentum

Which one of the following is nearly monochromatic

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Light from candle

Light from simple lamp

Light from sodium lamp

Light from sun

In the assessment of total uncertainties when power factor is involved, the percentage uncertainty is

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Added

Multiplied by that power

Divided by that power

None of these

A metal ball hangs from a spring balance which is placed on the wall of an elevator under freefall. Why does the spring balance show a weight of o(zero)N?

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because the ball is in free fall

because the spring balance is in free fall

both a and b

because the spring balance exerts no force on the ball

Which of the following sets of concurrent forces may be in equilibrium?

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F₁ - 3 N,F₂ - 5 N,F₃ = 6 N

F₁ - 3 N,F₂ - 5 N,F₃ = 15 N

F₁ - 3 N,F₂ - 5 N,F₃ = 1 N

F₁ - 3 N,F₂ - 5 N,F₃ = 9 N

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