Question # 1

__________ forces have opposite direction:

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Unlike parallel

Parallel

Like parallel

None of these

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

SI unit of pressure is pascal, which is equal to

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104 Nm-2

1 Nm-2

102 Nm-2

103 Nm-2

In velocity the body become double , then centripetal force will be:

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Half

Three times greater

Double

Four times greater

If the velocity of body increases with time, the acceleration will be.

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Negative

Uniform

Positive

Variable

If the velocity of moving body in circle is doubled, then its centripetal force is

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Double

Half

Four times

Remain

The large unit of work is:

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Kilowatt

Kilo joul

Mega joul

Both B and C

Motion of butterfly is an example of.

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Random

Circular motion

Linear motion

Vibratory motion

Einstein mass energy equation is:

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E= mc²

E= m²c

E = 1/2 mc²

2 mc²

Heat is an important form of

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Matter

Energy

Wind

Force

In falling object potential energy is covered to:

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K.E

Force

P.E

Nil

The motion in which the friction reduces the mechanical energy of the system as times passes and the amplitude of motion reduces is called:

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SHM

Randum motion

Damped motion

None of these

Field around a charge in which that charge exerts a force on a point charge brought in that field is called:

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Electric field

Magnetic field

Neutral zone

Point charge

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 direction of induced e.m.f. in a circuit is in accordance with conservation of.

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Mass

Charge

Momentum

Energy

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

Which statement is true about the magnetic poles?

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Unlike poles repel

Like poles attract

Magnetic poles do not effect each other

A single magnetic pole does not exist

study of charges at rest is called:

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acoustics

electrostatics

electronics

electricity

The vacuum all electromagnetic wave have the same

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speed

frequency

amplitude

wavelength

The device which converts digital quantities into analog quantities is called:

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ADC

DAC

ACD

CAD

The refractive index of ice is:

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1.00

1.33

1.31

2.42

The loudness of a sound is most closely related to its:

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Frequency

Period

Wavelength

Amplitude

Hot igneous rocks, usually in molten or partly molten state are found in the depth of

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5 km

10 km

15 km

20 km

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

The ratio of the velocities of wate in a pipe lying horizontally at two ends is 1 : 4 The ratio of diameters of pipe at these two ends is.

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1 : 2

2 : 1

1 : 4

4 : 1

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

Head to tail rule is used for

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Addition of vectors

Subtraction of vectors

Multiplication of vectors

Division of vectors

Waves transport energy without transporting

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Matter

Force

Momentum

All of these

The resultant of two forces 3N and 4 N acting at right angle to each other is.

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5 N

6 N

1 N

7 N

The property of bending of light around obstacles is

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Interference

Diffraction

Polarization

Superposition

When a fore of 100 N is acting on an object along x-axis then its vertical component will be.

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50 N

0 N

25 N

10 N

The dimensions of angular velocity are

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[LT-1]

[LT-2]

[T-1]

[L-1T-1]

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.

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Ohms

Kilo Ohms

Mega Ohms

Thounds Ohms

Thermosouple is an arrangement of two different metals:

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Two convert heat energy into electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electrical energy into heat energy

Shear modulus is expressed as:

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G = tanθ/F/A

F/A/tanθ

F/tanθ

tanθ/A

In photocopier, then drum is coated with layer of.

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Aluminium

Copper

Selenium

silver

One ohm is equal to

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VC-1

CV-1

AC-1

VA^-1

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

When charge particle enter perpendicular to magnetic field, the path followed by it is:

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A helix

A circle

Straight line

Ellipes

Output resistance of an op amp is

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High

Low

Zero

Equal to input resistance

The charge on Beta particle is

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+e

-e

-2e

None of these

If V_rms be the root mean square value of emf then its peak to peak value is given by