Question # 1

At resonance, the phase angle for RLC series resonance circuit equals

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0°

90°

180°

270°

The law of conservation of energy gives us

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equation of continuity

Bernoulli's theorem

both of them

none of them

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

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Ionization energy

Ionization potential

Excitation energy

Excitation potential

None of these

The intensity at a point due to a charge is inversely proportional to

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Amount of charge

Size of the charge

Distance between charge and the point

Square of the distance from the charge

None of these

Newton published laws of motion in his famous book "principia" in

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1867

1667

1676

1687

The magnetism produced by electrons within an atom can arise from

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electrons orbiting the nucleus

electrons posses a spin

both motions

none of these motions

When an oscillatory motion repeats itself, then this type of motion is called

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vibratory motion

constant motion

fixed motion

periodic motion

According to the Max plank, energy is redialed or absorbed in

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discrete packets

continuous waves

either of them

none of these

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

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10Ω

20Ω

30Ω

40Ω

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

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weak

strong and uniform

none-uniform

zero

To display a digit of EIGHT, the number of ON LED'S are:

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Two

Three

Five

Seven

Eight

An object is placed between the focus and the optical center of the convex lens. The image formed is

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Real, erect and magnified

Virtual, inverted and magnified

Virtual, erect and diminished

Virtual, erect and magnified

The main reason for the high speed of bullet train is

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Magnetic effect

Reduced friction

Design of train

None of these

Above the curie temperature, iron becomes

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ferromagnetic

paramagnetic

diamagnetic

any one of them

The relationship between Boltzmann constant K with R and N_Ais given as:

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k = RN_A

k = R/N_A

k = NR/N_A

None of these

The moment of linear momentum is called

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Impulse

Torque

Angular momentum

Couple

A lens of 2 cm focal length is to be used as a magnifying glass. Its magnification is

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13.5

12.5

0.5

2.5

The bottom of a container filled with liquid appear slightly raised because of

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Refraction

Interference

Diffraction

Reflection

If 'd' 'm' and fringe spacing ΔY are known, the interference effect due to light of λ

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Cannot be determine

Can be determined in same cases

Can be determined

None of these

A telescope has an objective of focal length 10 cm the magnifying power of telescope is 5.Its length in normal adjustment is

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7.5cm

10.5 cm

12 cm

15 cm

The nature of thermal radiation is similar to:

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Ultraviolet rays

Light rays

Both of them

None of them

The phenomenon of diffraction can be exhibited by

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Polarized waves only

Un polarized waves only

Longitudinal waves only

All polarized or un polarized waves and longitudinal or transverse waves

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