Question # 1

The path described by a projectile is called its

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orbit

trajectory

range

distance

In describing function of digital systems, 1 represents:

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Closed switch

True Statement

Lighted bulb

Only (B) and (C)

All are true

A physical system under going forced vibrations is known as

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Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

Viscosity of water is ______ that of air but ___ that of plasma.

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More, more

Less, more

Less, less

More, less

Astrophysics is a branch of physics, which deals with:

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Sub-atomic particles

Stars and galaxies

Light and sound

Music

The voltage increases linearly with

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time

velocity

acceleration

torque

Which of the following types 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 maximum stress that a material can withstand, is known as

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plastic point

elastic limit

yield point

ultimate tensile strength

The natural arrangement of colours in the spectrum of white light spectrum is

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VIBGYOR

ROYBGIV

ROYBIGV

BIGROYV

None of these

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

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Mg

1/2 Mg

Zero

2 Mg

When a nucleus emits an alpha particles, its charge number decreases by

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3

2

6

5

Essential characteristic of equilibrium is:

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Momentum equal to zero

Acceleration equal to zero

Kinetic energy equal to zero

Velocity equal to zero

The mass of a body measured by a physical balance in a lift at rest is found to be m.If the lift is going up with an acceleration a,its mass will be measured as:

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m (1 - a/g)

m (1+ a/g)

m

Zero

Which of the following statement about centripetal and centrifugal force is correct

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They are oppositely directed

They cancel each other

Both are on the same body

None of these

How does the Young's modulus vary with the increase of temperature?

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Decrease

Increase

Remains constant

First increases and then decreases

The most penetrating radiations out of the following is that of

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𝛾-rays

β-rays

α-particles

X-rays

The ratio of diameters of two convex lenses is ______ the ratio of their focal lengths

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Greater than

Less than

Equal to

Square of

Torque is a

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Scalar quantity

Vector quantity

Physical quantity

None of these

In a simple microscope if the final image is located at infinity then its magnifying power is

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25/f

25

f/25

[1 + (25/f)]

The communication with any place on the surface of the Earth can be made by the wave/rays known as

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Infrared

Microwave

X-rays

Radio waves

The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as

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conductors

insulators

semi-conductors

all of them

The study of properties of fluid at rest is called

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Fluid dynamic

Fluid statics

Both a and b

dynamics

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