Question # 1

Graphs which are used to illustrate the variation of velocity of an object with time are called

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distance time graphs

speed time graphs

velocity time graphs

acceleration time graphs

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

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inverting input

non-inverting input

any one of the input terminal

none of them

The obvious effect/s of current is/are:

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Heating effect

Magnetic effect

Chemical effect

Both (C) and (B)

All of these

The potential difference across each resistance in series combination is

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same

different

zero

none of these

Amorphous solids are also more like

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crystalline solids

gases

liquids

any one of them

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

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100 ms^-1

200 ms^-1

450 ms^-1

900 ms^-1

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

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R₁= 2R₂

R₂= 2R₁

R₂=4R₁

R₁= 4R₂

The electrons in the outermost shell of an atom are called

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core electrons

valence electrons

high energy electrons

none of them

The dot product of electric field intensity E and vector area A is called

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Electric potential

Electric flux

Electric field

Magnetic field

According to Stoke's law, drag force depends on

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Initial velocity

Final velocity

Terminal velocity

Instantaneous velocity

Tick the conservation force:

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Tension in a string

Air resistance string

Elastic spring force

Frictional force

An electronic computer is basically a vast arrangement of electronic switches which are made from

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Resistors

Transistors

N -type crystals

P-Type crystals

Capacitors

The effect of applying a force on a moving body is to change

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its direction of motion only

its speed of motion only

both the direction and speed of motion

its inertia only

Which of the following quantities remain constant in step up transformer?

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Current

Voltage

Power

Heat

The value of relative permittivity of different dielectrics are

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Equal

Different

Greater than one

Smaller than one

Both B and C

If the acceleration of a body is not uniform, then velocity-time graph will be:

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Curve

Straight line

Sphere

All of these

In equation F=ma, then mass 'm' is

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rest mass

variable mass

inertial mass

gravitational mass

In the phenomenon of hysteresis

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magnetism leads the magnetising current

magnetism lags behind the magnetising current

meganetism goes along the magnetising current

none of them

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

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Newton

Joule

Joule-Sec

Joule-s^-1

Watt

Real gases strictly obey gas law at:

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High pressure and low temperatures

Low pressures and high temperatures

High pressures and high temperatures

None of these

Example of progressive wave is

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transverse waves

longitudinal waves

both of them

none of them

In a semi-conductor material, the total current is

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only the +ve current

only the electronic current

sum of +ve and electronic current

all of them

The unit of work function is:

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Joule

Electron volt

That of threshold frequency

Both (A) and (B)

None of these

The device in which induced emf is statically induced emf is:

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Transformer

AC generator

Alternator

Dynamo

A resonance curve for RLC series circuit is a plot of frequency versus

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Voltage

Current

Impedance

Reactance

In half wave rectification

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both halves of the input voltage is used

only one half of the input voltage is used

either of these

none of these

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

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Remains constant

Decreases

Increases to infinity

Reduced to zero

A second's pendulum is a pendulum whose time period is

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1 second

2 seconds

3 seconds

4 seconds

When a horse pulls a cart, the force that makes the horse run forward is the force exerted by

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The horse on the ground

The horse on the cart

The ground on the horse

The ground on the cart

In a transistor, the central region is called

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collector

emitter

base

none of them

Root out the conventional source of energy:

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Energy from blomass

hydroelectric energy

Geothermal energy

None of these

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