Question # 1

The kinetic energy of the body of mass 1000 kg moving a speed of 20 ms^-1 will be:

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2 x 10² J

2 x 10³J

2 x 10⁵J

2 x 10⁸J

Hydraulic press is a machine which works on:

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Hook's law

Pascal's law

Boyle's law

Archimedes principle

The amount of matter in a body is called:

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Velocity

Momentum

Mass

Force

A satellite revolving around very close to Earth has speed nearly:

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8 kms^-1

5 kms^-1

10 kms^-1

100 kms^-1

Density of water is:

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100 kgm^-3

1000 kgm^-3

10 kgm^-3

1 kgm^-3

In the nineteenth century, physics science were divided into distine discipline.

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5

4

6

7

Gravitational force is a:

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Electric force

Magnetic force

Reactional force

Electromotive force.

The static fraction between wood and lather is _______________

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0.6

0.7

0.9

0.8

Worst absorber of heat is:

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Dull black surface

Coloured surface

Shinning silvered surface

White surface

SI unit of pressure is pascal, which is equal to:

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10⁴ Nm^-2

1 Nm^-2

10²Nm^-2

10³ Nm^-2

The speed of light is equal to:

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3 x 10⁵ ms^-1

3 x 10⁸ms^-1

3 x 10⁹ms^-1

3 x 10²ms^-1

To see from submarine the ship at the surface of water , we use:

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Telescope

Microscope

Peri scope

Prism

The substances which do not have free electrons are called:

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Insulators

Conductors

Semiconductors

None of these

The refractive index of internal coating of optical fibre is:

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1.56

1.51

1.53

1.58

The part of waves at which particles of the medium are below the normal position are called:

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Extreme positon

Crest

Trough

None of these

The A.C used in Pakistan has frequency:

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60 Hz

30 Hz

50 Hz

130 Hz

An object gains excess negative charge after being rubbed against another object, which is:

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Neutral

Negatively charged

Charged

Either, a,b,and c

with the increase in temperature the resistance of pure metals:

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increases

decreases

remains same

none of these

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

1 KB = :

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1024 bytes

1024 KB

1024MB

None of these

The waves, which are used to detect the broken bones, are called:

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Light waves

x-rays

Sound waves

both b,c,

Radioactive isotopes present in atmosphere is

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Cobalt -60

Ph-32

Carbon -14

Carbon -20

The frequency of waves produced in microwave oven is

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1435 Hz

2450 MHz

1860 MHz

2850 Hz

A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is.

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5 N

500 N

50 N

5000 N

Time period of geostationary satellite of radius 'R' is

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1 hour

48 min

1 day

1 month

The formula for the power is

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P= W/d

P=W/v

P=W/t

P=Wt

the acceleration of a body having SHM, depends upon its.

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Time period

Amplitude

Frequency

Displacement from mean position

Crests and trough are formed in.

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Longitudinal waves

transverse waves

Stationary waves

Compression waves

A body rotating with angular velocity of 2 radian/s and linear velocity is also 2 ms-1, then radius of circle is.

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1 m

0.5 m

4 m

2 m

Huygen's proposed, light energy travels in space from source in

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1578

1678

1778

1868

Direction of angular acceleration is always along

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x-axis

y -axis

z-axis

The axis of rotation

when a ball is throng straight up, the acceleration at its highest point is.

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Upward

Down ward

Zero

Horizontal

The instrument which detects the instant as which the external pressure becomes equal to the systolic pressure is called.

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Manometer

Sphygmomanometer

Barometer

Stethoscope

The semi conductor diode has the property of

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Two way conduction

Zero conduction

One way conduction

Amplification

Rectification is the process of converting.

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D.C. into A.C.

A.C. in to D.C.

Low signal to high

High signal to low

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

The fact that electric field exist in space around an electrical charge is

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Electrical property

Gravitational property

Intrinsic property of nature

Extrinsic property of nature

The energy of 4th Orbit in hydrogen atom is.

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-2.51 eV

-3.50 eV

-13.60 eV

-0.85 eV

Commentator was invented by

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Henry

Ousted

Maxwell

William sturgeon

e.m.f is the conversion of --------------- energy into electrical energy

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Chemical

Solar

Light

None of these

The potential difference across the depletion region of germanium is.

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0.3 V

0.5 V

0.7 V

0.8 V

How many neutrons are there in the nuclide Zn⁶⁶?

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22

30

36

66

Light of 4.5 eV is incident on a Cesium surface and stopping potential is 0.25 eV, maximum K.E. of emitted electron is.

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4.5 eV

4.25 eV

4.75 eV

0.25 eV

Electron vibrating 94,000 times each second will produce radio waves of frequency.

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94 Hz

940 HZ

94 Hz

490 Hz