Question # 1

Rolling friction is___________ then sliding friction :

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Greter

Less

Some

Half

A ball of mass 1 kg moving with velocity 2 ms-1, Its momentum will be

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1 Ns

2 Ns

0.5 Ns

4 Ns

When 10 N along positive x-axis and 7 N along negative x-axis are added by head to tail rule. The resultant force is:

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17 N

10 N

7N

3 N

The device that is used to measure the temperature of a body called

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Thermometer

Acidimeter

Barometer

Clock timer

The value of 'g' is maximum

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At mountains

At plains

At the surface of earth

At sea level

That force which produces an acceleration of one metre per second per second in a body of one kilogram mass is called

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1 joule

1 newton

1 watt

1 ampere

The value of 'g' on the surface of moon is:

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1.62 ms^-2

10 ms^-2

20 ms^-2

Zero

The force with which earth attracts a body towards its center is equal to its

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Mass

Weight

Charge

Radius

Science is that word which is derived by Latin word.

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Scient

Scientis

Scientia

Sciincet

On heating Air become:

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Heavier

Lighter

Remain same

None of these

Which of the following material lowers friction when pushed between metal plates:

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Water

Fine marble poder

Air

Oil

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2 Ω

4 Ω

8 Ω

12 Ω

The open switch Boolean expression is represented by:

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0

1

10

2

which is a major cause of fires and explosions at many places:

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match sticks

bombs

static electricity

magnetism

The resistance of voltmeter is:

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zero

low

Very high

10Ω

The speed of sound in are water at 25°C is:

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1530ms-1

1531ms-1

1560ms-1

1570ms-1

What does the term e-mail stand for?

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Emergency mail

Electronic mail

extra mail

external mail

Which of the following is an insulator:

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Copper

Iron

Silk

Silver

1 Nano farad is equal to:

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1X10^-12F

1X10⁹F

1X10^-9F

1X10^-6F

First voice signal was transmitted in the form of electrical signal in:

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1870

1875

1876

1880

According to Fleming's left hand rule the direction of force on the conductor is given by:

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Thumb

Fore finger

Middle finger

None of these

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

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Zero frequency

Low frequency

Medium frequency

High frequency

A bat finding its correct location by sending

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Matter waves

Ultrasonic waves

Infrasonic waves

electromagnetic waves

If the object is at 5 cm from the lens of simple microscope than its magnifying power will be.

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5

10

15

25

The largest satellite system is managed by

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116 countries

126 countries

136 countries

140 countries

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

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0.5

5

10

20

A force of 100 N makes an angle of 60o with Y- Axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

Force acting on the piston to move outward is.

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Compressive stoke

Power stoke

All stoke

Exhaust stoke

The motion and rest are

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Absolute

Relative

Mutual

All of these

Name the quantity which is a vector.

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Speed

Force

Temperature

Density

First law of thermodynamics can be defined by the equation

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The law of conservation of energy is the basis of.

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Stream line flow

Equation of continuity

Bernoulli's equation

Venture relation

By increasing the amount of stretch in spring the force exerted will

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Increase

One watt

One erg

One joule

Intensity of field inside a hollow charged sphere will be.

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Negative

Unaffected

Zero

Maximum

Commentator was invented by

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Henry

Ousted

Maxwell

William sturgeon

The uncertainty principle was given by

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De-Broglie

Heisenberg

Einstein

Max Planck

The critical temperature of Aluminum is.

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3.72 K

1.18 K

7.2 K

8.2 K

If a step up transformer were 100% efficient the primary and secondary winging's would have the same.

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Current

Power

Voltage

Direction of winding

The ratio of potential barriers of Ge to Si at room temperatrue is.

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7:3

1:3

2:5

3:7

The current induced can be increased by:

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Using a stronger magnetic field

Moving the loop faster

Replacing the loop bay coi of many turns

All of above

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

The conductor experience force, placed in magnetic above:

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Move towards weaker part of field

Move towards stronger part of field

Remains at rest

Move upwards in space

Which particle has larger range in air.

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Alpha rays

Gama rays

Beta rays

Neutron

The SI unit of magnetic induction Tesla is equal to

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N-1 Am

NA m2

NA-1n2

NA-1m-1