Question # 1

When brakes are applied to a fast moving car, the passenger will be thrown:

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Forward

Backward

Downward

none of these

The temperature at which the vibrations become so great that structure of the Crystal breaks up, is called:

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Critical temparature

Temperature of vaporization

Melting point

Both (A) and (C)

Both (A) and (B)

In the forward biases situation, the current flowing across the p-n junction is a few:

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amperes

Milli amperes

Micro amperes

Pico amperes

None of these

A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be

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64 W

80 W

100 W

125 W

The slopes 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 counter, which also provides the power to the G.M. tube is called:

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Thin mica window

thin glass window

Airy window

Wooden window

None of these

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

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subsonic speed

sonic speed

super sonic speed

any one of them

In case of the three dimensional deformation, when volume is involved, the ratio of applied stress to volumetric strain is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

The projectile motion is composed of

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horizontal motion only

vertical motion only

horizontal and vertical motion

none of them

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

A changing magnetic flux creates around itself

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An electromotive force

An electric field (changing electric flux)

Magnetic field

None of the above

The SI unit of charge is

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Ampere

Watt

Coulomb

Volt

Joule

In the above figures, tell which set is graphs shows that a body is moving uniform velocity:

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(i) and (ii)

(ii) and (iii)

(i) and (iii)

(ii) and (iv)

The change of magnetic flux through a circuit will produce

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Magnetic Field

Electric Field

emf

a.c

Machine parts are jammed due to:

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Increasing in viscosity of lubricant

Decreasing in viscosity of lubricant

Decreasing in surface tension of lubricant

None of these

According to the special theory of relativity, time is

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absolute quantity

not absolute quantity

constant quantity

none of these

The unit of flux density is also given by

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Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

When weight of an object falling freely becomes equal to the drag force, then the body will move with

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increasing speed

decreasing speed

constant speed

none of them

Slope of velocity time graph represents:

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Acceleration

Speed

Torque

Work

In case of mechanical waves, we study the motion of

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a single particle

collection of particle

any one of them

none of them

F = I(L x B) is a

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vector

scalar

unit vector

none of these

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

During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with

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maximum speed

zero speed

maximum speed

none of them

A particle having mass and charge equal to that of an electron is called:

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Proton

Positron

Pion

Pi-meson

Both (C) and (D)

Which one of the following is dimensionless:

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Acceleration

Velocity

Density

Angle

We can express the work in term of

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directly measurable variables

indirectly measurable variables

either of them

both of them

In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:

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Adhesive force

Nuclear forces

Inter atomic cohesive force

Electromagnetic force

None of these

The magnetic field inside a solenoid can be increased by:

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Increasing n

Decreasing I

Increasing I

By using iron core within solenoid

All correct except (B)

Flight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

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0 J

2 J

5 J

10 J

When a nucleus emits an alpha particle, it atomic mass decreased by

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2

1

4

3

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