Question # 1

The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

Bernoulli's equation is important in the field of

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Electrical circuit

Magnetism

Photoelectric effect

Flow of fluids

The speed of sound in a medium depends on

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The elastic property but not on the inertia property

The inertia property but not on the elastic property

The elastic property as well as the inertia property

Neither the elastic property nor the inertia property

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

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

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32°C

-32°C

-40°C

-212°C

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

The number if neutrons in the nucleus of ₉₂U²³⁵are

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Infinite

92

235

143

The vibrations of factory floor caused by the running of heavy machinery is an example of

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free vibration

natural vibrations

forced vibrations

all of them

Structure of the nucleus was explained by

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J.J Thomson

Bohr

Millikan

Rutherford

A person is sitting in a traveling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is

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Moving forward and gaining speed

Moving forward and losing speed

Moving forward with uniform speed

Moving backward with uniform speed

The capacitance of a parallel plate capacitor depends upon

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Area of the plates

Separation between the plates

Medium between the plates

All of the above

The light form Sun reaches earth in the form of

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plane wavefront

circular wavefront

spherical wavefront

elliptical wavefront

The measure of deformation in a certain solid due to the action of stress is called

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Hooke's law

Mechanical advantage

Stress

Strain

At certain speed, the time taken by light in moving from M to m and back to M is equal to the time taken by

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Face 4 to 1

Fact 6 to 1

Face 3 to 1

Face 2 to 1

Ordinary light has components of vibrations in

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one direction only

two directions

four directions

all directions

The ability of the body to return to its original shape is called

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deformation

stretching

compressing

elasticity

A radioactive nucleus can emit:

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Electron

𝛼 particles

Positron

Any of these

A man pushes a wall and fails to displace it. He does

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Negative work

Positive work but not maximum work

No work at all

Maximum positive work

A uniform plank of weigth 20 N is 200 cm long and rests on a support that is 60 cm from one end At what distance from that end must an 80 N weight be placed in order to balance the plank

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10 cm

20 cm

40 cm

50 cm

In colour printing, the entire range of colours uses just

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Three colours

Four colours

Five colours

None of these

The magnetic moment of electron is

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9.27 x 10^-24 joule/Tesla

9.27 x 10^-24 Tesla/joule

9.27 x 10^-23joule/Tesla

9.27 x 10^-23Tesla/joule

Which of the following converts electrical signals into light signals?

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optical fibre

receiver

reflector

transmitter

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