Question # 1

Which of the following type of force can do no work on the particle on which it acts:

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Frictional force

Gravitational force

Electric force

Centripetal force

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

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0.1 m

0.2 m

0.98 m

Full length of the capillary tube

When the p-n junction is forward biased its resistance is of the order of

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few mega ohms

few kilo ohms

few ohms

few milli ohms

Area under the force displacement graph gives

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Power

Work

Heat

Energy

Substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

If the value of C in a series RLC circuit is increased, the resonant frequency

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Is not affected

Increase

Remains the same

Decreases

Inertial frame of references are those frame of references which are moving with

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increasing velocity

decreasing velocity

constant velocity

all of them

Amperean path is a:

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Closed path

Rectangular path

Circular path

Any of above

Broken path

When a force is applied on a body, several effects are possible Which of the following effect could not occur?

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the body rotates

the body speeds up

the mass of the body decreases

the body changes its direction

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

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waves

beat

interference

resonance

Orbital velocity of an object mass m is proportional to

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m°

m²

m

m³

The spectrum of a star’s light is measured and the wavelength of one of the lines as thesodium’s line is found to be 589 nm. The same line has the wavelength of 497 nm whenobserved in the laboratory. This means the star is

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Moving away from the earth

Moving towards the earth

Stationary

Revolving around the planet

2π radian is equal to the degrees

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180^o

90^o

360^o

None of these

In a experiment to determine acceleration due to gravity by simple pendulum a student commits 1 % positive error in the measurement of length and 3 % negative error in the measurement of time period The percentage error in the values of g will be

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7%

10%

4%

3%

The displacement coincides with the path of motion when a body moves along a

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Straight line

Curved path

Zig Zag path

None of these

Which of the following statements for an object in equilibrium not true?

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The object must be at rest

The object can be at rest

The object is moving at constant

The acceleration of the object is zero

When m₂>> m₁and V_{2 = 0 then result of their velocities}

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V₂= 0 and V₁= V'₁

V'₁= -V₁and V'₂= 0

V₁= V₁and V₂= 0

None of these

The ballistic missiles are useful only for

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long ranges

short ranges

medium ranges

none of them

The nature of thermal radiation is smaller to:

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Ultraviolet rays

Light rays

Both of them

None of these

Steradian is a unit of

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Radius

Plane angle

Solid angle

None of these

Slope of velocity time graph gives

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Distance

Instantaneous acceleration

Instantaneous velocity

Instantaneous speed

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