Question # 1

Planets move around the sun due to.

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Centrifugal force

Centripetal force

Gravitational pull between them

Frictional force between them

As a positively charged rod is brought closer and closer to a positively charged electroscope the gold leaf.

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diverges

Converges

is neutralized

Is unaffected

The electromagnetic waves propagated outing space from antenna of a transmitter are known as.

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Infrared waves

Light waves

Radio waves

X-rays

No current flows between two charged bodies when connected if they have same.

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Charge

Capacity

Potential

Shape

Any substance that can flow is a

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Solid

Gas only

liquid only

Fluid

How the small bulbs used for decoration purposes are connected.

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In parallel

In series

In mixed order

In vertical position

The ratio of tensile stress to tensile strain is called.

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Shear modulus

Bulk modolus

Young's modulus

Elastic limit

An example of simple harmonic motion is

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Fast moving cricket ball

Motion of bicycle

Motion of a bee

Motion of simple pendulum

The device in the circuit that consume electrical energy are known as.

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Resistors

Capacitors

Fuses

Load

The SI unit of gravitational constant G is.

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kg m-1 s-1

kg m2 s-2

kg m3 s-2

kg m2 s-1

Which of the substances is the lightest one.

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Copper

Mercury

Aluminium

Lead

Maximum detail of an object can be seen by a microscope when the object is illuminated by light of.

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Longer wavelegth

Shorter wavelength

X -rays

Gama rays

Which one the following is not a component of a Bipolar junction Transistor

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Base

Emitter

Collector

Grid

When light emitting diode is forward biased, it emits light of the colour

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Red

Yellow

Green

All of these

Sub atomic particles which experience strong nuclear force are.

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Leptons

Hadrons

Mesons

Quarks

A force of 20 N is applied on an elastic spring if the extension produced in the springs to cm, the value of spring constant.

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2 Nm-1

20 N m-1

200 N m-1

2,000 N m-1

A car is travelling with uniform acceleration the road has check posts every 100 m When the car passes one post , it has a speed of 10 m s-1 and when passes the next one its speed is 20 ms-1 What is the cars acceleration.

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0.67 m s-2

1.5 m s2

2.5 m s-2

6.0 m s-2

Inductance divided by resistance and the product of capacitance and resistance both have units of.

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Charge

Time

Force

Current

If a wave vibrate 10 times in 1 s with a speed of 10 m s-1 the correct wavelength of the wave is.

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1 m

10 m

20 m

100 m

When two point charges of equal magnitude and opposite sign exist very close to one another the arrangement is called.

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An electric dipole

An amperian current

A null charge

A neutral source

Hygen's principle states that

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Light travels in straight line

Light travels in electromagetic waves

All points of primary wave front are source of secondary wavelets

Light has dual nature

Which of the following are particle accelerators.

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Cyclotrons

Synchrotrons

Linear accelerators

All of the above

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

Which following properties of molecules of a gas is same for all gases at a particular temperature.

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Momentum

Mass

velocity

K.E.

At high frequency the current through a capacitor will be

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Small

Zero

Large

Infinity

Why freezer a refrigerator is located in the top section

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Motor is not affected

Heat gained from environment is less

The entire chamber of freezer is cooled quickly

Heat gained from environment is more

A Carnot engine can be 100% efficient of the sink is at.

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0 k

0 oF

0 oC

273 K

Sunlight can undergo total internal reflection if it enters from

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Glass to air

Air to glass

Air to water

Water to glass

Which of the following statement is correct for a particle moving in a horizontal circle with constant angular velocity.

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The linear momentum is constant but the K.E. varies

The K.E. is constant but the linear momentum varies

Both K.E. and linear momentum are constant

Both speed and linear velocity are constant.

The SI unit of strain is

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N m-1

N m-2

N m

It has no unit

Torque is equal to.

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The product of magnitude of force and acceleration

The product of magnitude of force and momentum

The product of magnitude of force and displacement

The product of magnitude of force and angular velocity

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