Question # 1

The S.I unit of frequency is

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Vibrations s^-2

Ms^-1

Hertz

s^-1

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

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1%

20%

30%

50%

70%

Radioactivity

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is exhibited more by semiconductors in general

in exhibited more by the element when they are coupled

with other radioactive elements by a covalent bond

is an atomic property of radioactive elements

Those quantities which can be measured accurately are known as

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Physical Quantities

Scalar Quantities

Vector Quantities

Non Physical Quantities

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

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the driving force is large

the driving force is zero

the driving force may be feeble

all of them

When a conductor is moved across a magnetic field, the redistribution of charge sets up:

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Magnetic field

Electrostatic field

Electromagnetic field

All of these

None of these

For a parallel resonant circuit at resonance, current from supply is

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minimum

maximum

zero

none of these

An inkjet printer uses in its operation:

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Neutrons only

Mesons only

Positrons and photons

An electric charge

None of these

Electric lines of force

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Intersect each other

Are always parallel

Are always anti-parallel

Never intersect

None of these

A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:

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+5 X 10¹J

+5 X 10²J

+5 X 10³J

+5 X 10⁴J

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

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11.0 ohm

1.0 ohm

7.0 ohm

3.0 ohm

A body moving with uniform velocity has

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positive acceleration

negative acceleration

infinite acceleration

zero acceleration

Gaussian surface is always:

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Rectangular

Spherical

Cylinder

Box shape

Any of these

When transistors are used in digital circuits they usually operate in the

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Active region

Breakdown region

Saturation and cutoff regions

Linear region

The current sensitivity of the galvanometer is

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C/BAN

BAN/C

CAN/B

CBN/A

The projectile attains maximum horizontal range when it is projected at an angle of

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30°

45°

60°

75°

A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is

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60 kg wt

72 kg wt

48 kg wt

Zero

Which one of the least multiple:

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Pico

Femto

Nano

Atto

The rate at which the free electrons pass through any section of a metallic wire from right to left is:

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Greater than the speed at which they pass from left to right

Less than the speed at which they pass from left to right

The same speed at which they pass from left to right

Any of above

None of them

The induced emf in a coil is proportional to:

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Magnetic flux through a coil

Rate of change of magnetic flux through the coil

Area of the coil

Product of magnetic flux and area of the coil

Capacitance of two or more capacitors

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Increases in series combination

Increases in parallel combination

Remains unchanged

None of the above

In wilson cloud chamber, the air becomes saturated with:

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Alcohol vapours

Water

Helium gas

Nitrogen gas

None of these

By convention, torques producing clockwise rotation are taken as:

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Positive

Nagative

Zero

None of these

A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:

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Zero

Of smaller magnitude

Of larger magnitude

Sometimes B, sometimes C

Neither 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 energy acquired by a mass of 1g moving with the speed of light is

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3 x 10⁸J

9 x 10¹³J

3 x 10¹³J

9 x 10¹⁶J

The amplitude of oscillation of each atom in a metallic crystal rises with the

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rise in temperature

decrease in temperature

even temperature remains constant

all of them

CRO deflects the beam of

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proton

a-particle

electron

neutron

Consider a spherical shell of metal at he centre of which a positive point charge is kept

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The electric filed is zero outside the shell

The electric field is zero everywhere

The electric field is zero in the region inside the shell

The electric field is non-zero in both regions outside and inside the shell

One kilogram of different substances contain

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same number of molecules

different number of molecules

may be same or different

none of them

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