Question # 1

A common method used to meagnetics a materials is.

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Hitting

Heating

Stroking

Placing inside a solenoid having AC current

Inertia of a body is related to which of the following quantitiies

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Friction

Force

Mass

Weight

A hypothesis

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May or may not be testable

Is supported by evidence

Is a possible answer to a question

All of these

Why do scientists develop a hypothesis before conducting research.

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Hypotheses help a researcher decide which observations to record and which to ignore

It give them direction on how to interpret the results of their research

It helps to predict outcomes and define the parameters of the rsearch

Hypotheses give the researcherr an outcome to shape their work around

A book of mass 5 kg is placed on the table, the magnitude of net force acting on the book is.

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0 N

25 N

5 N

10 N

The SI Unit of Power is

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Watt

Joule

Newton

Second

The color of a door is brown, is an example of.

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Law

Prediction

Observation

Hypothesis

Which one is a better choice for a liquid in glass thermometer is that.

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Wets glass

Is colourless

Is a bad conductor

Expand linearly

The type of energy derived from heated groud water is

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Tidal energy

Hydroelectric energy

Nuclear energy

Geothermal energy

An object with a mass 5 kg moves at constatn velocity of 10 ms-1 A constant force then acts for 5 seconds on the object and gives it a velocity of 2 ms-1. In the opposite direction ,The force acting on the objects is.

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-12 N

5 N

-10 N

-15 N

A heavy and a lighter object have same momentum. The object with greater kineic energy is.

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Heavy

Lighter

Same kinetic energy

Either a or b

If the distance is nspring is 'x' of mass 'm' attached with a spring then restoring force is:

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F =ma

F =kx

F = mx

F= m/a

The speed of sound is air at 21 ^oC is:

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336 ms^-1

343 ms^-1

430 ms^-1

470 ms^-1

Electric intensity is a quantity.

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Scalar

Vector

Base

None of these

Which device is used to show the change in the value of current or electrical potential as a graph?

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Cathode ray tube

Electron gun

Oscilloscope

Transformer

The coulomb's law is valid for the charges which are:

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moving and point charges

moving and non-point charges

stationary and pont charges

stationary and large size charges

That period in which voltage repeats its value in equal intervals is called:

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cycle

Time period

Frequency

Amplitude

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Lens

Mirror

How many possible solutions are there for a prblem?

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One

Two

Three

Multiple

The part of waves at which particles of the medium are below the normal position are called:

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Extreme positon

Crest

Trough

None of these

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

NOT gate is also called:

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Converter

Inverter

Transmitter

Receiver

The SI unit of work is

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Newton

Joule

Mol

Calorie

Blood has density equal to that of

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Mercury

Sodium

Honey

Water

The resultant of two forces 3N and 4 N acting at right angle to each other is.

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5 N

6 N

1 N

7 N

Pressure of fluid will be low where speed of fluid is.

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Low

Zero

High

Constant

A ray of light shows the direction of propagation of light It is line which is.

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Normal to the wave front

Parallax to the wave front

Opposite to the wave front

Equal to the wave front

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

A double convex lens acts as diverging lens when the object is

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At infinity

Inside the focus

A way from focus

A a large distance from lens

Centripetal force perform

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Maximum work

Minimum work

Negative work

No work

The direction of angular velocity is determined.

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Left hands rule

Head to tail rule

Right hand rule

General rule

Unit of impulse is equivalent to that of.

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Force

Momentum

Acceleration

Velocity

If the pressure of a gas is doubled, then speed of sound is.

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Doubled

Become half

Not affected

Increases by four times

The electric intensity due to two oppositely charged plates is

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None of these

Which one of the following is correct

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All of above

The moderator used in a nuclear reactor

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Sodium

Uranium

Graphite

Cadmium

The leV =

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1.6x10-19C

1.6x10-11J

1.6x10-19J

1.6x10-11C

To convert a galvanometer into an ammeter, we connect with it a

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Shunt resistance

Low value parallel

Low value by pass resistor

All of above

The fact that electric field exist in space around an electrical charge is

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Electrical property

Gravitational property

Intrinsic property of nature

Extrinsic property of nature

The unit for Plank's constant is:

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Js^-1

Jm

Js

Jm²

amu =

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1.06 x 10^-27 kg

1.6606 x 10^-27 kg

1.520 x 10^-21 kg

1.6606 x 10^-31 kg

Vrms =

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0.7V_∘

0.07V_∘

0.007V_∘

0.75V_∘

The magnetic flux will be max, For an angle of:

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0°

60°

90°

180°

A solid in which there is not regular arrangement of molecules is called.

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Glassy solid

Amorphous solid

Crystalline solid

Both a and b