Question # 1

Value of 'g' on surface of moon is:

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1.62 ms^-2

3.7 ms^-2

9.2 ms^-2

10 ms^-2

The freezing point of Mercury is:

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49 ^oC

-49^oC

39^oC

-39^oC

The average speed of cheetah is.

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60 kmh^-1

70 kmh^-1

75 kmh^-1

80 kmh^-1

A Leslie cube is a:

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Metal box

Wooden box

Glass box

None

The force which keeps a body to move in a circle is called

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Gravitational force

Centripetal force

Centrifugal force

Rotational force

The specific heat of water is

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2100 Jkg-1 k-1

4200 Jkg-1 k-1

2500 Jkg-1 k-1

2010 Jkg-1 k-1

The unit of coefficient of friction .

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Newton

ms^-1

ms^-2

No unit

The Atwood machine can be used to find the acceleration due to gravity using the equation

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g = 2 (m1 x m2)/(m1 + m2) a

g = (m1 - m2)/(m1 + m2) a

g = (m1 + m2)/(m1 - m2) a

Process by which liquids changes into vapors is ............... .

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Vaporization

Evaporation

Boiling

None of above

The value of tan 45^ois:

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0.5

1.732

1

0.5777

Formula of Power:

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P = wt

P = w/t

P = t/w

P = w/t²

1 GB =

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1022MB

1023 MB

1024MB

1025MB

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

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Light waves

x-rays

sound waves

both b and c

the resistance of conductor is inversely to:

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temperature

length

area of cross section

pressure

Coulomb's law is mathematically stated as:

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F = k q1 q2/r3

F = k q2 q2 / r2

F = k q1 q2 / r

F = k q1 q2 / r2

An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located:

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out beyond the centre of curvature.

at the centre of curvature

between the centre of curvature and the focal point

at the focal point

If 2 joules of energy is required to transfer one coulomb of charge from one point to another, the potential difference between these points will be:

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1V

2V

4V

6V

The time period of simple pendulum can be calculated by:

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T = 2π√L/g

T = 2 π √m/k

T = 2 π √g/L

T = 2 π √K/m

The focal length is related to radius of curvature by the formula:

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f = 2R

f = 4R

f = R/2

R = f/2

The waves which travel in straight line through space and have strong signals are called:

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Micro waves

Mechanical waves

Light waves

Magnet waves

The vacuum all electromagnetic wave have the same

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speed

frequency

amplitude

wavelength

Which of the following is an insulator:

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Copper

Iron

Silk

Silver

If a convex lens is used as a magnifying glass, whcih lens will give higher magnification that has.

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Short size

Long focal length

Large size

Short focal length

Force acting on the piston to move outward is.

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Compressive stoke

Power stoke

All stoke

Exhaust stoke

Blood has density equal to that of

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Mercury

Sodium

Honey

Water

100 radians are equal to.

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57.3^o

75.3^o

573^o

5730^o

Bio mass is converted into fuel by

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Evaporation

Fermentation

Reflection

Scattering

A typical diffraction grating has certain number of lines per centimeter whose range is.

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40 to 50

400 to 5000

400 to 500

4000 to 5000

The device used to study the spectra from different sources of light is

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Telescope

Optical fibre

Spectrometer

Microscope

The regular or steady flow of fluid is called

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Stream line

Turbulent flow

Average flow

None of these

Average translational K.E. of molecules for an ideal gas is given as

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1/2 KT

KT

2/3 KT

3/2 KT

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.

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

The force which is responsible for the breaking up of the radioactive element is.

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Weak nuclear force

Strong nuclear force

Electromagnetic force

Gravitational force

The function of three anodes a C.R.O is

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To accelerate electrons only

To focus the electrons only

To control the brightness of spot on screen

To accelerate and focus the electrons

The device which allows only the continuous flow of AC through it is.

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Inductor

Battery

Thermistor

Capacitor

The electric field created by positive charge is:

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Radially outward

Circular

Radially inward

Zero

Energy stored in inductor is.

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1/2 L I²

1/2 LI

1/2 L2I

1/2 L2I2

James chadwick discovered:

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Proton

Positron

Neutron

Electron

The magnitude of back emf:

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Increases with sped of motor

Decreases with speed of motor

Remains same

None of above

In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of.

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90^oC

Zero

120^oC

45^oC

At 0 K a piece of silicon is a

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Conductor

Semi-conductor

Insulator

All

A metal rod of 1 m is moving at a speed of 1 ms-1 in a direction making an angle 30^o with 0.5 T magnetic field . The emf produced is.

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0.25 N

2.5 N

0.25 V

2.5 V

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola