Question # 1

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

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-y direction

+y direction

+z direction

-z direction

None of these

There is no way to detect:

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Absolute uniform motion

Accelerated motion

State rest

State of motion

None of these

A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be:

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10 m/sec2

20 m/sec2

30 m/sec2

Zero

The cohesive forces between atoms, molecules or ions in crystalline solids maintain the strict

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short range order

long range order

both of them

none of them

The most abundant isotope of neon is

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neon-20

neon-21

neon-22

neon-23

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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Instantaneous value

RMS value

Value averaged over a cycle

Either (B) or (C)

Either (A) or (C)

The product of induced current and the resistance of the wire through which the current is passing is called:

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Electromagnetic induction

induced emf

Induced current

Self induced

None of these

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

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200 W

302.5

250 W

350 W

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

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Maximum

Minimum

Zero

Very small

None of these

The charge carriers in gases are

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electrons

ions

protons

ions and electrons

By CAT scans, we can detect the density difference of the order of:

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1%

20%

30%

50%

70%

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5μF

10μF

3μF

6μF

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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positive temperature

negative temperature

absolute temperature

zero temperature

When quarter of a circle is completed, phase of vibration is:

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90°

180°

45°

360°

The SI unit of viscosity is

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kg m^-1s^-1

kg ms^-1

kg m^-1s^-2

kg m^-1s

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

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100 K

273 K

0 K

-273 K

The peak voltage in a 220 volt A.C. supply is nearly

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220 volt

253 volt

.311 volt

440 volt

The henry is the unit for

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Resistance

Magnetic flux

Magnetic field

Inductance

Amplitude in SHM is equivalent to ______ in circular motion:

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Diameter

Radius

Circumference

None of these

Acceleration produced in a body by the force varies

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inversely as the applied force

directly as the applied force

directly as the mass of the body

none of them

The path (or trajectory) described by a projectile is

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a parabola

a hyperbola

a circle

a straight line

The nuclei of an element having the same charge number but different mass numbers are called:

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Isobars

Isotopes

Isomers

Isobaric

Isothermal

The conductivity of a superconductor is

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Infinite

Very large

Very small

Zero

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

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Q=V/C

Q=C/V

Q=1/2CV

Q=CV

β-particles are easily deflected by collisions than heavy

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α-particles

β-particles

γ-particles

none of these

The unit of resistivity is

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ohm

ohm-m²

ohm-meter

ohm-m^-1

Examples of physical quantities are:

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Length

Color

Effect of music

All of these

An emf is set up in a conductor when it

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Is kept in a magnetic field

Is kept in an electric field

Moves across a magnetic field

Both A and B

None of these

What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10^-2Wb, and change in current is 0.01 A?

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2 H

3 H

1/2 H

Zero

Coulomb multiplied by volt by volt gives the unit called:

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farad

Ohm

Second

joule

Watt

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