Question # 1

the depth of a pond is 4 m What is the apparent depth of the pond if the water level is 3.5 m high. The refractive index of water is 1.33

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1.9 m

2.3 m

3.13 m

4.5 m

When net force acting on a system is zero which of the following will be constant.

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Force

Linear momentum

Angular momentum

Linear impulse

What is the degree of magnetization of a material.

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Susceptibility

Ablitity

Retentivity

Capacity

The direction of induced emf during electromagnetic induction can be determined by making use of.

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Faraday's law

Ampere;s law

Lenz's law

Laplace law

The sum of the positive and negative peak values is known as.

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Peak value

Average value

Instantaneous value

Peak to peak value

The fundamental quantities which form the base of the SI are.

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mass, energy and time

mass, force and time

mass, length and time

mass , length and time

If the wavelength of a wave is 1 cm and its period is 0.02 s , velocity of the wave will be

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20 cm s-1

50 m s-1

60 cm s-1

100 cm s-1

If a body of mass 'm' was released in a vacuum just above the surface of a planet of mass M and radius R what will be the gravitational acceleration.

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GmM/R

GM/R²

GM/R

GM/2R

What does the electricity meter record.

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Charge

Current

Energy

Power

In the experiment of photo electric effect the minimum frequency of photons at which electrons are emitted from a metal surface is called.

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Critical frequency

Typical frequency

Threshold frequency

Surface frequency

In a Nuclear reactor which material is often used as modeerator.

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Water

Graphite

Uranium

Water and graphite

A point source of light is situated at large distance The nature of the wave front at the point will be.

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Cylindrical

Spherical

Plane

Ellipical

A freshly made sample of radioactive material gives a count rate of 8,000 counts per minute After twenty days it gives a count rate of 500 counts per minute What is the half life of the materials.

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5 days

10 days

40 days

20 days

The SI unit of magnetic flux is.

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N A-1

N m-1 A

N m A-1

N m-1 A-1

Where is the velocity of electrons maximum in a diode.

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Near the cathode

Near the anode

In the space ini between the two elecrode.

It is same throughout the tube

Who developed hypothetical heat engine that has the maximum possible efficiency in 1824

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Saadi carnot

August Otto

rudolf Diesel

Kari Benz

Coulomb's law for the electrostatic force between two electric charges resembles the

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Law of conservation of energy

Law of conservation of mass

Newton's law of gravitation

Newton's law of motion

The maximum number of rays required by a lens to form an image are

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2

3

4

Infinite

When impurities are added to metals they

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Will decrease the elasticity

Will increases the elasticity

Will not change the elasticity

Will or will not change the elasticity

The magnetic flux density at the centre of a long solenoid is dependent on.

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The number of turns per unit length of the silenced

The volume of the solenoid

The diameter of each turn of the solenoid

All of above

A steel of which material should be placed between the plates of a parallel plate capacitor in order to increase its capacitance.

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tin

Iron

Copper

Mica

Which vector can be used to locate the centre of mass of a collection of particles.

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Null vector

Unit vector

Position vector

Distance vector

In compound microscope, image formed by the eyepiece is

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Real

Invented

Erect

Diminished

The gas thermometer is taken as the primary standard because.

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Thermometers are easily reproducible

Readings can be accurately taken

No correction are necessary

It produces he thermodynamic scale

The maximum K.E of photo electrons depends upon

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Energy of incident radation

Frequency of incident radiation

Wavelength of incident radiation

Mass of incident radiation

Pressure of a gas depends upon

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Only on the molecular speed

Only on the speed of molecules on a unit volume

Only on the mass of molecules

Number of molecules mass and speed in a unit volume

Alpha particles are used for the treatment of skin of a patient due to.

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Highly ionizing power

Low penetration power

Positively charged particles

Helium nucler

Mosley's law establishes the X-rays fluorescence of target element with is.

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Atomic weight

Atomic number

Density

Lattice constant

What is the about the electric field inside a metallic sphere.

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It is zero

It varies with the shape of the conductor

It depends on the charge there

It does not charge the metallic sphere

When light emitting diode is forward biased, it emits light of the colour

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Red

Yellow

Green

All of these

Which materials have exactly zero electrical resistivity.

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Metals

Insulators

Semi conductors

Super conductors

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