Question # 1

___________ specific heat of water is benefits in sustaining life.

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High

Low

Medium

None

If the force of 25 N pulls a stone through a distance of 5 cm in its direction the magnitude of work will be:

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5 J

125 J

175 J

200 J

In reading 27.5 first two digits are accurate while third one is.

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Accurate

Correct

Doubtful

In correct

Earth's gravitational force of attraction vanishes at:

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6400 km

Infinity

42300 km

1000 km

The amount of heat absorb by body depends on the :

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Colour of the surface

Nature of surface

Texture of surface

Both A and B

When a block a place on the surface its weight produce.

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Tension

Momentum

Inertia

Normal reaction

Brownian motion is an example of.

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Linear motion

Random motion

Circular motion

Vibratory motion

The formula of torque is:

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L= F x E

E = F x t

t = F x L

E = F x L

The fastest bird falcon has speed.

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100 kmh^-1

200 kmh^-1

300 kmh^-1

400 kmh^-1

Which of the following relation is correct?

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F = m/a

F = m-a

F = ma

F = m + a

In which hot liquid can remains hot:

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Glass

Lead

Thermos

Hot pot

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

Mathematical formula of electromotive force (e.m.f) is:

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E = W/Q

E = Q/W

E = WQ

E = W2Q

How Galvanometer is connected in circuit to detect current?

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In Series

In Parallel

Fixed

Variable

Volt is named after the Italian physicist:

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Faraday

Alessandro volta

Newton

Coulomb

The frequency of silent whistle is:

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20,000 Hz – 25000Hz

2000 Hz – 2500Hz

200 KHz – 2000 Hz

25000 KHz

The speed of sound in air at 100°C is:

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380ms-1

382ms-1

386ms-1

300ms-1

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

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0 V

30 V

45 V

60 V

Which device is used to show the change in the value of current or electrical potential as a graph?

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Cathode ray tube

Electron gun

Oscilloscope

Transformer

The power of small fan is:

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40 W

50 W

60 W

80 W

In there is no extension in the spring then this positon is called

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Equilibrium position

Unequilibrium

Nautral equilibrium

Stable equilibrium

Information storage device work on the principles of:

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Heat

Sound

Light

Magnetism

For 0.0036 no. of significnat digits

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1

3

2

4

The area between velocity time graph and the time axis is numerically equal to.

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?Speed of object

Distance covered by the object

Average velocity of the object

Acceleration of the object.

The diver spin faster when moment of inertia becomes.

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smaller

Greater

Constant

Equal

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

Crests and trough are formed in.

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Longitudinal waves

transverse waves

Stationary waves

Compression waves

Speed of sound in aluminum at 20 ^oC is.

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3600 m/s

5100 m/s

5130 m/s

3500 m/s

Food rich in proteins is:

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potato

grapes

vegetables

bread

The velocity of a free falling body just before Hattin the ground is 9.8 ms-1, the height through which is fall be

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98 m

19.6 m

4.9 m

9.8 m

If the slope of a velocity time graph gradually decreases than body is said to be moving with

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Positive acceleration

Negative acceleration

Uniform velocity

None

When hot and cold water are mixed, the entropy.

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Decreases

Increases

Remain constant

Zero

S.I Unit of pressure of gas is.

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Nm

N.m

N2/m

N3m

The rest mass x ray photon is

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Infinite

Zero

1.67 X^-17 kg

All of the above

The following gas was identified in the sun using spectroscopy

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Hydrogen

Helium

Carbon

Nitrogen

The value of Stefan is constant is:

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4.57 x 10^-8 m²k²

5.67 x10^-8 wm^-2k^-4

6.67x 10^-11 wm²k⁴

7.45 x 10^-9 m² wk³

Which one pair belongs to acceptor impurity.

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Aresincl, phosphorus

Boron, gallium

Arsenic, antimony

Antimony, indium

One weber is equal to:

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N.A ²/m

N.m²/A

N.A/m

N.m/A

_______ is the building block of every electronic circuit.

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Semi conductor diode

Resistor

Capacitor

Amplifier

Direct current can not flow through.

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Inductor

Resistor

Transistor

Capacitor

In three phase A.C supply coils are inclined at an angle of.

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0^o

90^o

120^o

80^o

Kx -Xrays are produced due to transition of electron from.

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K to L shell

L to K shell

M to K shell

M to L shell

In RLC circuit the energy is dissipated in

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R only

R and L

R and C

L and C

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C