Question # 1

On hot days cold air from sea began to move towards land:

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Sea breeze

Land breeze

Both A and B

None of these

The force which opposes the motion is called.

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Momentum

Friction

Inertia

Tension

A material of thermometer should has:

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Visible

High freezing point

Low melting point

All of these

Hydraulic press is a machine which works on

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Hook's law

Archimedes principle

Pascal's law

Boyle's law

Independent quantities are taken on

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- x - axis

x -axis

-y-axis

y-axis

Room are heated using gas heaters by:

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Conduction only

Convection and radiation

Radiation only

Convection only

Which one is a good conductor?

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cotton

air

wool

iron

1 micro =

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10^-3

10^-6

10^-2

10^-12

The value of absolute zero kelving temperature is:

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273^oC

273^oK

273^oF

-273^oC

Co-efficient of friction between glass and glass.

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1.0

0.9

1

0.8

The boiling point of mercury is:

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-10 ^oC

150^oC

375^oC

457^oC

Which type of image is produced by the converging lens of human eye if it views a distant object:

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Real, erect, same size

Real, inverted, diminished

Virtual, erect, diminished

Virtual, inverted, magnified

In fixed capacitor dielectric used is:

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Paper

Metal

Mica

Paper & mica

If a charged body is brought near a negatively charged electroscope and the leaves of electroscope diverge, then the body is:

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Positively charged

Negatively charged

Neutral

None of these

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

Aperture

Frequency of tuning fork depends upon its …………. of prongs:

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Weight

Speed

Mass

Distance

An object gains excess negative charge after being rubbed against another object, which is:

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Neutral

Negatively charged

Charged

Either, a,b,and c

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

Specific resistance of silver is:

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1.7x10^-8 Ω.m

2.63x10^-8 Ω.m

2.75x10^-8 Ω.m

7.0x10^-8 Ω.m

The characteristics of sound by which we can distinguish between two sounds of same loudness and pitch is called.

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Intensity

Quality

Loudness

Pitch

The process of breaking a heavy nucleus after the bombardment of neutrons into two small nuclei is called:

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Nuclear fission reaction

Nuclear fusion reaction

Nuclear Radiation

Nuclear chain reaction

The output of OR gate would be '0' When:

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Both of its inputs are zero

One of its two inputs is zero

Both of its inputs ar 1

Any one of its inputs is 1

The angular acceleration a =

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Time rate of change of angular displacement is called

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Linear velocity

Angular velocity

Rotational velocity

Vibrational velocity

For a gas obeying Boyle's Law, if the pressure is doubled, the volume becomes.

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Double

Three fold

One half

Remains the same

The largest satellite system is managed by

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116 countries

126 countries

136 countries

140 countries

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

The light energy travels in space as waves was firstly proposed by

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Maxwell

Young

Einsten

Hydrogen

A collision in which K.E. of the system is not conserved is

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Elastic collision

Inelastic collision

3rd low of motion

None of these

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

Air blows from

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High pressure to low pressure

Low pressure to high pressure

Low temperature to high temperature

High temperature to low temperature

Beats can be heard when difference of frequency is not more than.

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8 Hz

10 Hz

4 Hz

6 Hz

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

One electron volt is equal to.

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1.6 x 10^-19 Joule

1.6 x 10^-19Coulomb

1.6 x 10^-12N

1.6 x 10¹⁸Joule

The winding of the electromagnet in motor are usually called.

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Magnetic coils

Field coils

Electric coils

electric o electric coils

If the north pole of a magnet moves away from a metallic ring

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Clockwise

Anticlockwise

First clockwise and then anticlockwise

None of above

The number of protons in any atom are always equal to the number of

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Neutrons

Electrons

Positrons

Mesoris

Average value of current and voltage over a complete cycle is.

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Positive

Negative

Zero

Infinite

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

A two inputs NAND gat with inputs a and b has an output '0' if.

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B is zero

A is zero

Both A and B are 1

Both A and B are '0'

The mass spectrum of naturally occurring neon shows the most abundant isotope has atomic mass.

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19

20

21

22

amu =

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1.06 x 10^-27 kg

1.6606 x 10^-27 kg

1.520 x 10^-21 kg

1.6606 x 10^-31 kg

Max planck received noble prize in:

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1927

1932

1918

1914

The numerical value of Compton wavelength is equal to

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3.43 x 10^-12 m

1.43 x 10^-12m

2.43 x 10^-12m

0.43 x 10^-12m