Question # 1

SHM is type of ______ motion

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Vibratory

Linear

Circular

None

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

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equal to the resonant frequency

slight different from the resonant frequency

greatly different from the resonant frequency

any one of them

The waves produced in a microwave oven have wavelength.

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12 mm

12 cm

12 m

12 mm

When the bob of simple pendulum is at extreme position, its K.E. will be

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maximum

minimum

zero

all of them

1 gm-cm^-3is equal to:

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10³kg-m^-3

10^-3kg-m^-3

1 kg-m^-3

10⁶kg-m^-1

Diameter of the nucleus s of the order of

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10^-10m

10^-12m

10^-15m

10^-18m

In a straight current carrying conductor, the direction of magnetic field can be found by

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right hand rule

left hand rule

head to tall rule

none of these

Laplace formula is derived from

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Isothermal change

Adiabatic change

Isobaric change

None of these

Astrophysics is a branch of physics, which deals with:

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Sub-atomic particles

Stars and galaxies

Light and sound

Music

If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm²will be

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1 cm

2 cm

8 cm

None

A diode characteristic curve is a plot between

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current and time

voltage and time

voltage and current

forward voltage and reversed voltage

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

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10N

50N

2N

20N

Silicon can be obtained from:

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Lead

Uranium

An isotope of oxygen

Sand

The wave form of S.H.M will be

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square wave

sine wave

rectified wave

saw-tooth wave

If a given spring of spring constant k is cut into two indentical segments, the spring constant of each segment is:

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k/2

2 k

4 k

None of these

The induced current is a conductor depends upon:

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Resistance of the loop

Speed with which the conductor moves

Any of these

Both (A) and (B)

None of these

Method "lamp and scale arrangement" used to measure the

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angle of deflection

restoring torque

magnetic field strength

current

The SI unit of electric field intensity is

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CN^-1

NC^-1or Vm^-1

JC^-1

AV^-1

When the total displacement is divided by total time taken, we get:

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Velocity

Average speed

Average velocity

None of these

If a freely oscillating system is subjected to an external force, then

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free vibrations will take place

the body will move with its natural frequency

forced vibrations will take place

none of them

In the expression F x t, the force F is

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total force

instantaneous force

average force

all of them

The absolute temperature of the tripple point of water is

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100°C

4°C

373 K

273.16 K

The ideal gas law is

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P = nRT

V = nRT

PV =RT

PV =nRT

The pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

10⁶electrons are moving through a wire per second, the current developed is

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1.6 x 10^-19

1 A

1.6 x 10^-15A

10⁶A

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

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Equal to

Greater than

Smaller than

None of these

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

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e.m. waves

mechanical waves

sound waves

water waves

If the instantaneous velocity of a body does not change. the body is said to be moving with

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average velocity

uniform velocity

instantaneous velocity

variable velocity

The half life of uranium-238 is

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6.2 x 10⁹years

4.5 x 10⁹days

4.5 x 10⁹years

1.3 x 10⁶years

The types of mechanical energy is/are:

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Kinetic energy

Potential energy

Both of these

None of these

Which of the following diode is used for the detection of light

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photo diode

light emitting diode

photo voltaic cell

all of them

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