Question # 1

The error may occur due to:

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Negligence

Faulty apparatus

Inappropriate method

all of these

A body can have constant velocity when it follows:

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A circular path

A rectilinear path

Trajectory of a projectile

None of these

A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

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Zero

g

-g

V + g

Amplitude in SHM is equivalent to ______ in circular motion

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Diameter

Radius

Circumference

None of these

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

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Is smaller than

Is greater than

Becomes equal to

None of these

As the light shines on the metal surface, the electrons are ejected

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slowly

instantaneously

either of these

none of these

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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2 m

1 m

0.5 m

4 m

A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

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80 m

20 m

160 m

40 m

When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as

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impurification

adding

doping

extrinsivity

Work done on a body by gravity in lifting it up to certain height is

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Maximum

Minimum

Zero

Negative

At higher frequency of the alternating current, the capacitive reactance X_c

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Increases

Decreases

Remains the same

Increases only when the voltage increases

The fractional effect between layers of following fluid is

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Viscosity of fluid

Velocity of fluid

Acceleration of fluid

Pressure of fluid

When R^x is negative and R^y is positive, the resultant lies in the second quadrant and its direction is

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θ = 90 + Φ

θ = 180 - Φ

θ = 180 + Φ

None of these

The length breadth and thickness of a block are given by 1= 12 cm b= 6 cm and t= 2.45 cm.the volume of the block according to the idea of significant figures should be:

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1 x10² cm³

2 x 10² cm³

1.763 x 10² cm³

None of these

Which of the given quantity is a vector

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Pressure

Momentum

Kinetic energy

Volume

Five equal forces of 10N each are applied at one point and all are lying in one plane.If the angles between them are equal,the resultant force will be:

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Zero

10 N

20 N

10 √2 N

In normal adjustment, the length of the telescope is

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f_e + f_o

f_o - f_e

f_e - f_o

None of these

The unit of intensity of electric field is

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newton/coluomb

Joule/culomb

Volt x metre

Newton/meter

The slope of the tangent at any point on the curve gives the value of the

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average velocity at that point

instantaneous velocity at that point

average acceleration at that point

instantaneous acceleration at that point

The least distance of distinct vision changes with

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Time

Health

illness

Age

The velocity of rain drop attains constant value because of

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Surface tension

Upthrust of air

Viscous force exerted by air

Air currents

The weight of 10 kg body falling freely is

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zero

98 N

9.8 N

10 N

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