Question # 1

A temperature rise in the environment disturbs life called:

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Air pollution

Land pollution

Noice pollution

Thermal pollution

1 MJ=

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10³ J

10⁶J

10⁷J

10^-3J

The devise used to measure the atmosphere pressure is:

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Rain gauge

Vacuum cleaner

Screw gauge

Barometer

Water freezes at

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0oF

32oF

273 K

0 K

Which gas is used inspite of Freon gas in refrigerator?

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CO₂

H₂

NH₃

N₂

The turning effect of force is called:

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Torque

Parallel force

Equilibrium

Couple

__________ forces have opposite direction:

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Unlike parallel

Parallel

Like parallel

None of these

Archimedes is a scientist:

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Greek

Italian

French

English

Larger is the area greater will be:

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Radiation

Transfer of heat

Evaporation

Conduction of heat

The bad conductor of Heat is:

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Iron

Copper

Air

Aluminium

How many scales of measurement of temperature are?

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One

Two

Three

Four

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

Aperture

How Galvanometer is connected in circuit to detect current?

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In Series

In Parallel

Fixed

Variable

The Half life of a certain isotopes is 1 day. What is the quantity of isotopes after 2 days?

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One half

One quarter

One eight

None of these

Which combination forms NAND gate:

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AND & OR

AND & NOT

NOT & OR

NAND & NOT

The two inputs of a NAND gate are A and B. Its output would be zero when:

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A = 0, B = 0

A = 1, B= 0

A = 1 , B = 1

A = 0 , B = 1

One coulomb is equal to charge of ________ electrons.

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6.25 x 10^-19

6.25 x 10¹⁹

6.25 x 10¹⁸

6.25 x 10^-18

Electronics is a branch of:

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Mass

Applied Physics

Mechanics

Nuclear Physics

By keeping resistance constant if we double the voltage then current will be:

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Double

4 times

¼ times

Half

An example of input device of computer is.

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Key board

Printer

Monitor

RAM

The waves in which particle of the medium vibrate parallel to the direction of waves are called

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Longitudinal waves

Transverse waves

Electromagnetic waves

both b and c

The distance of image from mirror is represented by:

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q

p

F

m

When distance is plotted against the force, it is taken along

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x-axis

y-axis

z-axis

None of these

The kinetic energy of molecules of an ideal gas at absolute zero is

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Very low

Very high

Zero

First increases then decreases

A layer over the central core of the jacke is called.

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Jacket

Plastic

Cladding

Rubber

The SI unit of product of pressure and volume is.

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_Watt

Joule

Pascal

Newton

In stationary waves the points which always remain at rest are.

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Nodes

Antinodes

Crest

Trough

Multimode step index fibre is useful for

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Long distances

Short distances

Better quality

Low price

The orbital angular momentum is associated with the motion of a body along

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Straight path

Circular path

Curved path

Along any path

The product of rotational inertial 'I' and angular velocity ' w' is equal to.

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Torque

Linear momentum

Angular momentum

Force

If the wave motion is 0.01 sec and wave speed is 100 ms-1 then frequency of wave is.

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0.5 Hz

1 Hz

10 Hz

100 Hz

Maximum number of components of a vector may be

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Infinite

One

two

three

The difference between two molar capacities is equal to.

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Plank's constant

General gas constant

Molar gas constant

Boltzmann constant

1 gray is equal to.

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1 JKg-1

1KgJ-1

1JKg

1 JKg-2

The bnding energy for nucleus A is 7.7 Me V and that for nucleus B is 7.8 MeV. Which nucleus has the larger mass?

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Nucleas A

Nucleus B

Less than nucleus

None of these

The force on a charge particle moving parallel to magnetic field is:

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Maximum

Minimum

Zero

None of these

Semiconductor diodes are called:

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Ohmic

non ohmic

Both a & b

none of above

The electric field created by positive charge is:

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Radially outward

Circular

Radially inward

Zero

Both Xenon and cesium have

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33 isotopes

34 Isotopes

36 Isotopes

35 Isotopes

Who explained the photo electric effect.

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Max Plank

Einstein

Henry

Rutherford

Force on a charged particle is zero when projected at angle with magnetic field.

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0 ^o

90^o

180^o

270^o

The SI unit of stress is same as that of.

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Pressure

Force

Momentum

Work

A substance having the negative temperature co efficient of resistivity out of the following is.

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Carbon

Iron

Tungsten

Gold

High frequency radio wave is called as

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Fluctuate

Carrier wave

Matter wave

Mechanical wave