Question # 1

A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?

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5 Joules

86 Joules

707 Joules

866 Joules

Minor but rapid change in atmospheric pressure cause:

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Poor condition

Intense condition

Windy condition

Pleasant condition

For balancing the beam balance, pointer must be at.

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Extreme position

Zero

The right side

The left side

The unit of Heat is:

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Kelvin

Joule

Jkg^-1 K^-1

kg

The value of 'g' is maximum

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At mountains

At plains

At the surface of earth

At sea level

The first man who gave the idea of gravity:

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Hero

Einstein

Newton

Faraday

Distance covered by freely falling downward body in first second.

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5 m

29.4 m

10 m

19.6 m

Sliding friction can be changed into rolling friction by using:

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Ball bearing

Roller bearing

Both a and b

None of these

A body of mass 5 kg i moving with a velocity of 10 ms^-1. Find the force required to stop it in 2s.

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5 N

25 N

20 N

30 N

Newton's law of gravitation resembles with

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1st law of motion

2nd law of motion

3rd law of motion

Law of gravitation

Larger is the area greater will be:

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Radiation

Transfer of heat

Evaporation

Conduction of heat

The diameter of spherical mirror is called:

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Curvature

Aperture

Sphere

Both a and b

If the change of current in a circuit induces a current in another circuit, this phenomena is known as:

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Self induction

Mutual induction

Electromagnetic induction

None mutual induction

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

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2 V

9V

18 V

36 V

The commercial unit of electrical energy is:

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Joule

Watt

Kilowatt hour

Electron volt

Who discovered the phenomenon of natural radioactivity?

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Henry Becurial

Merry Curi

Perry

Rutherford

According to coulomb’s law, what happens to the attraction of two oppositely charged objects as their distance of separation increases:

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Increases

Decreases

Remains unchanged

Cannot be determined

Which of the following is not Processing?

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arranging

manipulation

calculating

gathering

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

SI unit of electric potential is:

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Watt

Volt

Coulomb

Joule

The time period of frequency and time period is equal to:

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v

1

0

λ

Which form of energy is sound?

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Electrical

Mechanical

Thermal

Chemical

When the amplitude of a wave become double, its energy becomes

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One half

Two times

Three times

Four times

If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.

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30 m

15 m

1 m

28 m

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

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

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

The waves used in radar speed trap are

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Longitudinal

Sound wave

Micro waves

Matter waves

Venturimeter is used ot measure.

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Speed of fluid

Pressure of fluid

Volume of fluid

Mass of fluid

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

The SI unit of work is

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Newton

Joule

Mol

Calorie

An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.

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0 K

0 ^oC

100 K

100 ^oC

The law of conservation of mass gives.

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Beronoulli's

Venturi relation

Torricelli's theorem

Equation of continuity

Concept of the electric field lines is introduced by

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Coulomb

Faraday

Einstein

Joseph henry

Electric potencial of earth is taken to be zero because the earth is good:

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Semiconductor

Conductor

Insulator

Dielectric

Substance which break just after the elastic limit is reached are called as.

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Ductile substances

Hard substances

Britto substances

Soft substances

Improper bisting of a transistor circiut produces:

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Heavy loading of emitter current

Distortion in the output output signal

Excessive heat at collector terminal

Faculty location of load line

One joule is equal to.

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1.6 x 10¹⁹ eV

1.6 x 10^-19 eV

6.25 x 10^-18 eV

6.25 x 10 ¹⁸ eV

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

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Band spectrum

Line spectrum

Continuous spectrum

Absorption spectrum

The symbol of p-n-p transistor is

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The charge on Beta particle is

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+e

-e

-2e

None of these

Charge on positron is:

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Negative

Positive

Netural

None of these

In A.C circuit of inductor which one is true

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Voltage leads current by phase angle π/2

Voltage lags current by π/2

Current leads voltage by π/2

Both remain in phase

Resistance tolerance of silver band is.

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10%

6%

7%

5%