Question # 1

Rate of change of momentum is equal to:

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Mass

Torque

Weight

Force

SI unit of pressure is pascal, which is equal to:

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10⁴ Nm^-2

1 Nm^-2

10²Nm^-2

10³ Nm^-2

The product of force and displacement is called;

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Work

Efficiency

Power

Energy

................ causes coastal breeze.

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Conduction

Convection

Radiation

Nil

To find x component of force 'F' we use formul:

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F Sin 𝜽

F Cos 𝜽

F tan 𝜽

F/F1

The temperature of sun surface is:

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5000°C

4000°C

6000°C

7000°C

The power of electric kettle is 500W and takes 2s to heat up, find heat generated?

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E = 250 w

E = 1000 w

E = 10000 J

1KJ

More radiation is reflected by the surface:

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White

Coloured

Black

Rough

Unit of thermal conductivity is .

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Wmk

W m^-1 K^-1

Wm

None of these

If base of a right angle triangle is 3 cm and perpendicular is 2 cm. What is tanθ

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0.7

1.5

2

3

Tan 𝜽 is equal to:

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Perpendicular/Hypotenuse

Base / Perpendicular

Base/Hyp

Perpendicular/Base

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

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Increases

Decreases

Remains the same

Cannot be predicted

The particles emitted from a hot cathode surface are:

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Positive ions

Negative ions

Proton

Electron

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

As the temperature of a conductor rises, its resistance.

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Increase

Decrease

Does not change

None of these

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

The rate of flow of charge through any cross-sectional area is called:

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potential difference

Energy

Coulomb

Electric current

The product of frequency and wavelength is equal to:

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Time period

Amplitude

Wave speed

Wave energy

In computer terminology information means.

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any data

raw data

processed data

large data

What is fitted in telephone receiver:

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Electromagnet

Diaphragm

Both a and b

None

The presence of fish by the other fish can be detected by:

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Magnetic field

Electric field

Gravitational field

All of above

Which is the unit of energy:

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KWh

Electron volt

Joule

All of above

The instrument which detects the instant as which the external pressure becomes equal to the systolic pressure is called.

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Manometer

Sphygmomanometer

Barometer

Stethoscope

If heat engine absorb 400 J and rejects 200 J heat energy, its efficiency will be.

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25%

50%

70%

100%

The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is

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2.45 watt

24.5 watt

245 watt

2.45 watt

Total confined light is obtained by

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Total internal reflection

Refraction of light

Diffraction

Polarization

Venturimeter is used ot measure.

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Speed of fluid

Pressure of fluid

Volume of fluid

Mass of fluid

the height of the geostationary satellite above the equator is.

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35000 km

36000 km

34000 km

33000 km

The lower reading of blood pressure is called.

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Systolic pressure

Diastolic pressure

Normal pressure

Non normal pressure

In which medium the speed of sound is greater.

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Oxygen

Air

Water

copper

In stationary waves, the velocity of particle at the node is.

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Maximum

Infinite

Zero

Varible

When two waves having same frequency traveling in same direction combine, phenomenon is called

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Wave motion

Combination of waves

Interference

Diffraction

Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

The unit of impedance is

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Farad

Henry

Tesla

Ohm

A charged particle having charge 'q' is moving at right angle to magnetic field. The quantity which varies is.

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Speed

Kinetic energy

Path of motion

angular velocity

The unit of work function is

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Electron volt

Ampere

Volt cell

Hz

106 electrons are moving through a wire per second the current developed is:

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1.6 x 10-19 A

1 A

1.6 x 10-13A

106 A

The Compton effect is associated with

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X-rays

y-rays

Positive rays

ß-rays

The work done is bringing a unit positive charge from infinity to that point in an electric field is called.

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Potential

Potential difference

Absolute potential

All of these

The stopping potential for a certain metal is 10 volts. Thus work function for the cathode is.

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10 J

1.6 X 10^-18 J

1.6 X 10^-19 J

1.6 X 10³⁰ J

Natural rubber is an example of:

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Crystalline solids

Amorphous solids

Polymeric solids

None of above

The principle regarding the dual nature of light was first discovered by

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Compton

J.J.Thomson

De-Broglie

Heisenberg

Transistors are made from

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Plastics

Metals

Insulator

Doped semi conductors

The emission of electrons from metal surface when exposed to light is called:

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Compton effect

Pair production

Photoelectric effect

None of above