Question # 1

The value of gravitational constant "G" is Nm² kg^-2

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6.67 x 10^-21

6.67 x 10^-11

6.67 x 10^-23

6.67 x 10¹¹

Newton related inertia of the body with its

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Weight

Mass

Density

Force

Evaporation causes:

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Melting

Boiling

Freezing

Cooling

The force exerted by earth on moon is :

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2.01× 1020 N

2.01× 1020 Kg

2.01× 1021 N

2.01× 1022 Kg m/s2

_____________ is an other unit of power.

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J

W

hp

W/J

The velocity of geostationary satellites with respect to the Earth is:

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Maximum

Zero

Minimum

100 ms^-1

Which of the following is a vector quantity?

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Distance

Power

Speed

Displacement

Normal human body temperature is

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15oC

37oC

37oF

98.6oC

Hydraulic press is a machine which works on:

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Hook's law

Pascal's law

Boyle's law

Archimedes principle

Distance covered by freely falling downward body in first second.

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5 m

29.4 m

10 m

19.6 m

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

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meters

second

moles

candela

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

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Absorbed

Totallly reflected

Partially reflected and partially transmitted

Totally transmitted

What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A?

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4.8 W

14.5 W

30 W

60 W

The distance between two consecutive troughs or crests is called:

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wavelength

Frequency

Time period

None of these

The coulomb's law is valid for the charges which are:

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moving and point charges

moving and non-point charges

stationary and pont charges

stationary and large size charges

The waves in which particles of the medium vibrate perpendicular to the direction of waves are:

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Electromagnetic waves

Sound waves

Both a and b

Transverse waves

If the field is stronger than lines of force are to each other:

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Far away

Separated

Closer

No effect

What is the voltage across a 6Ω resistor when 3 A of current passes through it?

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2 V

9 V

18 V

36 V

What happens to the intensity of the brightness of the lamps connected in series as more and more lamps are added?

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Increases

Decreases

Remains the same

Can not be predicted

The force applied on the mass attached with a spring is represented by:

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f_a

f_c

f_ext

f_s

The output of a two input NOR gate is 1 when:

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A is 1 and B is 0

A is 0 and B IS 1

Both A and B are 0

Both A and B are 1

Positive charge in an electric field always tend to move:

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Does not move

From lower to higher potential

From higher to lower potential

All of these

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

Sound wave can not be

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Reflected

Refracted

Diffracted

Polarized

The ability of a body to do work is called its

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Force

Power

Capacity

Energy

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

The Bragg's equation is given by

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Unite of thermodynamics scale of temperature is.

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Centigrade

Fahrenheit

Kelvin

Celsius

When newton ring are seen through the transmitted light, then central spot is.

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Dark

Blue

Bright

Red

When temperature of source and sink of a heat engine becomes equal then the entropy change will be.

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zero

Minimum

Maximum

Negative

The unit of work in base unit is

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Kg m-1 sec-2

Kgm sec-2

Kgm2 sec-1

Kgm-1 sec-1

The internal energy of system does not depend on

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Temperature

Pressure

Path

Final and initial state

The SI unit of angular momentum is

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J.S-2

J.S-1

J.S

J.m

Which one has greater cone of impurity among all:

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Emitter

Base

Collector

All are pure

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

Helium-Neon laser discharge tube contains neon

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82%

15%

25%

85%

Which one is not a ductile material

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Lead

Steel

Copper

Wrought Iron

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to:

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Uncertainity Priciple

De-broglie Theory

Einstin Theory

Photo electric effect

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

When a motor is over loaded then the magnitude of back emf.

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Increases

Decreases

Remain constant

Zero

The motional emf is give by

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qvB

IBL

eBL

vBL

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Wien's constant

Planck's constant

Davison constant

Lumber's constant