Question # 1

In radio-active decay, the original element which disintegrate to another element is called

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element

daughter element

parent element

none of these

Dimensions of velocity are

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[L]

[T]

[LT^-1]

[LT^-2]

The phenomenon of generation of induced emf is called

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Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both (A) and (D)

Davision and Germer performed experiment to verify

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de-Brogile hypothesis

theory of relativity

Newton's law of gravitation

Mass-energy relation

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

The value of the potential difference across the depletion region for the case of germanium is

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0.3 V

0.5 V

0.7 V

0.9 V

γ-rays are

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electrostatic waves

electromagnetic waves

heavy particles

longitudinal waves

The special theory of relatively treats the problems involving:

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Inertial frames of reference

Non-inertial frames

Non-accelerated frame

Botha (A) and (C)

Both (B) and (C)

Which of the following can become a good permanent magnet

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iron

steel

both of them

none of them

The distance from eye to near point is taken as:

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10 cm

15 cm

20 cm

25 cm

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

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Focal length

Aperture

Linear magnification

Principal axis

The time taken to complete one vibration is called:

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Frequency

Amplitude

Time

Time period

0.10 cm can be written as:

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1.0 x 10^-2m

1.0 x 10^-3cm

1.0 x 10^-4cm

1. x 10^-4m

Physics deals with the study of

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Matter

Energy

Both of them

Human Body

If the two charges in Coulomb's law have double distance between them, then electric force

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Becomes two-fold

Becomes four-fold

Remains the same

None of these

Density is defined as:

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Mass per volume

Volume per mass

Mass x volume

Mass per length

Ohm's law states that

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The current through a resistor is directly proportional to the applied voltage

The voltage across a resistor is directly proportional to the current passing through it

Resistance is the constant of proportionality between the voltage and current

all of these

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

In L.C.R series A.C. circuit, the phase angle between current and voltage is

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Any angle between 0 and +π/2

π/2

π

Any angle between 0 andπ/2

One radian is:

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Greater than one degree

Less than one degree

Equal to degree

none of these

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

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Greater, smaller

Smaller, smaller

Smaller, larger

Greater, larger

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine, is (Take g=9.8 m/s²)

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9.8 m/s

19.6 m/s

39.2 m/s

98.0 m/s

A particle moving uniformly along circle its projection along diameter performs

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Linear motion

Projectile motion

SHM

Rotatory motion

When there is no internal frictional forces between the adjacent layers of fluid, then the fluid is called

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incompressible

compressible

viscous

non viscous

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

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Stationary waves

Transverse waves

Both of these

None of these

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

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1 : 2

4 : 1

1 : 4

2 : 1

The area under line velocity-time graph is numerically equal to the

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speed of the body

acceleration of the body

distance covered by the body

none of them

The contrast in the fringes in an interference pattern depends upon

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Fringe width

Relative difference intensities of the two sources

Distance between the slits

Wavelength

Electric lines of force

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Intersect each other

Are always parallel

Are always anti-parallel

Never intersect

None of these

The vector in space has:

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One component

Two components

Three components

None of these

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