Question # 1

A book of mass 5 kg is placed on the table, the magnitude of net force acting on the book is.

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0 N

25 N

5 N

10 N

An object with a mass 5 kg moves at constatn velocity of 10 ms-1 A constant force then acts for 5 seconds on the object and gives it a velocity of 2 ms-1. In the opposite direction ,The force acting on the objects is.

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-12 N

5 N

-10 N

-15 N

Two rods with length 12.321vm snf 10.3 cm are placed side by side. the difference is their lengths is.

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2.02 cm

2 cm

2.021 cm

2.0 cm

Change in momentum of a body is equal to

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Force Velocity

Force Time

Mass time

Force

Which of the following is a base unit.

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Mole

Pascal

Coulomb

meter per second

Which of following prefeix represents largest value.

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Pico

Peta

Mega

Kilo

A cyclist is travelling in a westward rierction and produces a deceleration of 8 m/s2 to stop

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West

North

East

South

When using a mwasring cylinder one preceution to take is to.

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Check for the zero

Position the eye in line with the bottom of the meniscus

Look at the menscus from below the level of the water surface

Take several readings by looking from more than one direction

Which of the following numbers show 4 significant digits.

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9000.8

4

0.001248

5174.00

A ball is droped from the top of a tower, the distance covered by it in the first second is.

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5 m

10 m

50 m

100 m

The converter of analogue to digital signal is:

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ADC

DAC

ATDC

None of these

In variable capacitor, dielectric medium is:

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Paper

Air

Mica

Ceramic

The number of wavelength of waves passing through a point in one secnd is called:

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Time period

Cycle

Frequency

None of these

If the mass of a spring mass system is doubled, its time period becomes:

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√2 T

T/2

√T/2

T/√2

What should household appliances be connected in parallel with the voltage source?

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to increase the resistance of the circuit

to decrease the resistance of the circuit

to provide each appliance the same voltage as the power source

to provide each appliance the same current as the power source

An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror:

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-4.1 cm

-8.2 cm

-9.9 cm

-20 cm

The current used in houses is:

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A.C.

Conventiona current

Current

D.C

In computer terminology information means.

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any data

raw data

processed data

large data

Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly__________ to the wavelength of the wave:

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Two times

Equal

Four times

None of these

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

The maximum range of projectile is 100 km, Take 9=10 ms-2, the initial velocity of the projectile will be.

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1000 kms-1

1 kms-1

10 kms-1

100 kms-1

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is

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2.45 watt

24.5 watt

245 watt

2.45 watt

In case of point source the shape of wave front is.

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Plane

spherical

Circular

Eliptical

The difference between two molar capacities is equal to.

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Plank's constant

General gas constant

Molar gas constant

Boltzmann constant

A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is.

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10 ms-1

12.2 ms-1

15 ms-1

29.4 ms-1

The Newton's formula for the speed of sound in air is

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A body of mass 1.0 Kg dropped from the top of a tower of highest 50 m, what will be its K.E. 10 m below the top

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400 J

490 J

49 J

98 J

Cloud formation in atmosphere is an example of.

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Isothermal process

Isochoric process

Adiabatic process

Isobaric process

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

If a charged body is moved against the electric field it will gain.

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P.E.

K.E.

Mechanical energy

Electrical potential energy

Light emitting diodes are made from semiconductors.

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Silicon

Germanium

Carbon

Gallium arsenide

By modern system of NAVSTAR, the speed any where on the earth can be determined to accuracy about.

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20 ms-1

10 ms-1

2 cms-1

2 ms-1

Earth orbital speed is

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10 km/s

20 km/s

30 km/s

40 km/s

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

Two up quarks and one down quarks makes a

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Proton

Newton

Photon

Meson

The series in visible region is:

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Balmer series

Pfund series

Paschen series

None of above

An electron moves at 2 x 10² m/sec perpendicular to magnetic field of 2T what is the magnitude of magnetic force:

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1 x 10^-6 N

6.4 x 10^-17 N

3.6 x 10^-24 N

4 x 10⁶ N

The wavelength associated with the protons moving at speed of 40 m/s is.

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7.20 nm

9.02

15.7 nm

17.3 nm