Question # 1

The unit of gravitational constnat is:

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Nm² kg

Nm²kg^-2

Nm²kg^-1

N - m²

The fastest bird falcon has speed.

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100 kmh^-1

200 kmh^-1

300 kmh^-1

400 kmh^-1

PQ & RS are 2 parallel forces moving in same direction than they are called ............... forces.

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Like parallel

Unlike

Parallel

Nil

The Earth is surrounded by a cover of air called

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Atmosphere

Solid

Environment

Surroundings

Leslie's cube is a bod of

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Metal

None Metal

wood

Metalloids

The velocity and acceleration of the body moving with uniform speed in a circular path will be:

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In same direction

In opposite direction

Mutually perpendicular

Equal

According to Archimedes principle the density of a substance is determined by using formula

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D = w1/w2 + w1 x p

D = w1w2/w2- w1 x p

D = w1/w2 - w1 x p

D = w1w2/w2- w1 x p

The forces that are parallel to each other and have the same direction are called:

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Like parallel forces

Unlike parallel forces

Resultant forces

Net forces

Clockwise torque is taken:

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Positive

Negative

Neutral

Nil

Barometer was first set up by:

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Robert

Torricelli

Al Razi

Nil

Tensile strain produces the change in the object.

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Length

Volume

Area

Density

Which device is used to store charge:

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Resister

Capacitor

Dielectric

Fuse

The speed of sound in iron at 25°C is:

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5950 m/sec

5900 m/sec

6950 m/sec

6940 m/sec

That period in which voltage repeats its value in equal intervals is called:

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cycle

Time period

Frequency

Amplitude

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

The resistance of conductors is due to:

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Protons

Fixed atoms

Molecules

Neutrons

Instrument used for detecting and testing the nature of charge on a body is called:

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Incubator

Spectroscope

voltmeter

electroscope

The difference between the loudness of faintest audible sound and loudness of another sound is called:

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Pitch of sound

Quality of sound

Sound level

Intensity of sound

Which frequency is used by elephants to communicate with each other:

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Zero frequency

Low frequency

Medium frequency

High frequency

How many possible solutions are there for a prblem?

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One

Two

Three

Multiple

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral particle

Repels a neutral particle

battery is one of the source of:

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heat

light

current

sound

SI unit of work

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Newton

Walt

Pascal

Joule

The equations of angular motion hold only in case when the axis of rotation is

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Moving

Fixed

Both a and b

None of these

In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is.

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Real inverted

Virtual diminshed

Virtual inverted

Virtual erected

Bending of light around the edges of an obstacle is called.

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Refraction

Polarization

Interference

Diffraction

Light entering rom air glass does not change in its.

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Frequency

Wavelength

Velocity

Direction

No of spark plugs needed in the diesel engine are.

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0

1

2

3

The work done in gravitational field

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Depend upon the path

Does not depend upon the path

(+)ve

Zero

The relation between linear and angular velocity is

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The horizontal component of velocity of projectile

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Increases

Decreases

Remain same

Decreases and then increases

When the body moves with constant acceleration the velocity time graph is

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Parabola

Hyperbola

Straight line

Curve

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

Two parallel wires carrying currents in the opposite direction.

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Repel each other

Attract each other

Have no effect upon each other

They cancel out their individual magnetic fields.

The temperature at which, semiconductor behaves as insulators:

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10k

0k

237k

None of above

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

Coulomb's force is:

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Conservative force

None conservative force

Similar to frictional force

None of the above

The ratio of applies stress to volumetric strain is called:

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Young modulus

Shear modulus

Bulk modulus

Tensile modulus

Photodiode is used for wave nature of.

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Light

Thermal radiation

Radi waves

Sound waves

Potentiometer is used to.

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Compare emf of two cells

Detect internal resistance of cell

Measure P.D.

All of these

By increasing the temperature of conductor, the flow rate of charges.

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Increase

Remains constant

Decreases

Changes exponentially

The peak value of alternating current is 5√2 A. The mean square value of current will be:

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5A

2.5A

5√2A

5²

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time