Question # 1

If a body does work at the rate of 1 Js^-1then its power will be:

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KW

1 MW

1 W

None of these

Anything kept in thermos :

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In temperature remain constant

Its temperature decrease

Its temperature increase

None of these

if a body of a mass 'm' is moving with velocity 'v' then its K.E. is given by

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K.E. = 1/2 mv

K.E. = 1/2 mv2

K.E. = mv2

K.E. = 1/2 m2v

Meniscus of which liquid curves upward.

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Water

Honey

Mercury

Milk

____________ is bad conductors of heat:

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Copper

Water

Wire

Nil

Which gas is replaced by Ammonia in refrigerators?

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Nitrogen

Carbon di oxide

Methane

Freon gas

A body is placed at height 'h' above the surface of the Earth.The value of 'g' is given by

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gh = Me/(R + h)2

gh = GMe/(R +h)2

gh = GMe/R2h

_____________ can neither be created nor be destroyed.

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Light

Force

Energy

Weight

The formula of conversion of Celsius into Kelvin is:

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Tk = 273 - C^o

Tk = 273 + C^o

F = 1.8 + 32

All of these

Cos 0°=

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0.5

1

0.866

0

According to SI-Units , internsity of light is measured in.

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meters

second

moles

candela

The unit of potential difference is:

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Volt

Coulomb

Ampere

Joule

When we double the voltage in a simple electric circuit, we double the:

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Current

Power

Resistance

Both a and b

battery is one of the source of:

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heat

light

current

sound

The electric potential energy per unit charge is called:

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Electric field

Electric potential

Electric intensity

All of above

If the length of a simple pendulum is halved its time period will become:

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T/2

T = T/√2

√2T

2T

When a heavy nucleus splits into, lighter nuclei, the process would .

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Release nuclear energy

Absorb nuclear energy

Release chemical energy

Absorb chemical energy

A converging lens becomes a magnifying glass when an object is placed:

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Outside of focal length

Inside the focal length

Equal of focal length

At double of focal length

An example of input device computer is:

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Keyboard

printer

monitor

RAM

The half life of radium - 226 is 1620 years. If N is its total amount then after the four half lives, its left amount will be:

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1/2 N

1/4 N

1/8 N

1/16 N

To get a design on the computer screen by moving a pointer with the help of mouse is called:

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word processing

graphic designing

data managing

telecommunication

The line which passes through pole of the mirror and center of curvature is called principal:

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Axis

Focus

Line

None of these

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

In current carrying long solenoid the magnetic field produced does not depend upon.

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of the above

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

The induced emf in a coil is proportional to:

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Magnetic flux through the coil

Rate of change of Magnetic flux through the coil

Area of the coil

Product of magnetic flux flux and area of the coil

When nitrogen is bombarded by alpha particles nitrogen nucleus changes into

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Oxygen

Carbon

Barium

Helium

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

Which of the following basic force is able to provide an attraction between two neutrons:

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Electrostatic and nuclear b

Electrostatic and gravitational

Gravitational and strong nuclear

Only nuclear force

For Holography we use

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X ray

Laser

gama rays

Beta rays

Young's modulus for water's is

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Zero

1

2

3

The SI unit of resistivity is.

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Ohm m-2

Ohm m-1

Ohm m

Ohm

Electric flux is a:

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Scalar quantity

Vector quantity

Variable quantity

None of these

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