Question # 1

The motion of a projectile is

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one dimension

two dimension

three dimension

all of them

Resolving power in mth order diffraction for grating is given by:

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R = N/m

R = m/N

R = N x m

None of these

Conventional the angular Velocity is Directed at an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of above

An alpha particle has a charge of

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+2e

-2e

-e

+3e

With age, least distance of distinct vision:

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Increases

Decreases

Is not affected

None is correct

In the formula R = N x m for diffraction grating, N denotes:

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No. of lines/cm

No. of lines/meter

Total number of lines

None of above

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

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11.0 ohm

1.0 ohm

7.0 ohm

3.0 ohm

A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?

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60 km/hr

80 km/hr

120 km/hr

180 km/hr

When the object lies between F and 2F, the image formed by is formed at:

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Real

Virtual

Diminished

Erect

Resistance of a conductor depends upon

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the quantity of current passing through it

the voltage applied between its end

its dimensions, physical state and nature of its material

all of the above

A convex lens acts as diverging lens when the object is placed:

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Between F and 2F

At 2F

With focal length

Beyond 2F

Steam engine is:

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An optical system

A thermal system

A thermodynamic system

None of these

Most widely used optical fibres are those which propagate light by

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total interval reflection

continuous refraction

both of them

none of them

Age of the Earth is

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14 × 10¹⁷ sec

1.4 × 10¹⁹ sec

1.4 × 10¹⁷ sec

1.4 × 10¹⁵ sec

The domains are of macroscopic size of the order of

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centimetres

metres

millimetres

nanometres

The gravitational force of earth on a ball of mass one kilogram is 9.8 N. The attraction of ball on the earth is

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9.8 N

Negligible

Slightly less than 9.8 N

More than 9.8 N

The volt/metre is the unit of:

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Potential

Work

Force

Electric field intensity

In a spectrometer experiment monochromatic light is incident normally on a diffraction grating having 4.5 x 105 lines per meter.The second order line is seen at an angle of 30 to the normal what is the wavelength of the light?

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200 nm

430 nm

500 nm

556 nm

If the mass of earth becomes four times to its initial value than the value of g will be

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Does not change

Becomes four time

Become one fourth of its initial value

None of these

If the velocity of a body becomes double and mass becomes half then its K.E

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Becomes double

Becomes four times

Is halved

Becomes eight times

Types of physical quantities are

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one

Two

Three

None of these

Viscosity of gases with increase in temperature

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Increase

Decrease

Remains same

None

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