Question # 1

A material in which resultant magnetic moment is zero.

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Diamagnetic

Paramagnetic

Ferromagnetic

Anti ferromagnetic

When light of particular frequency is allowed to fall upon a metal surface electrons are emitted from a these emitted electrons are called.

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Photons

Holes

Quants

Photo electrons

The average amount of energy transported by a wave per unit area per unit time is termed as

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Wave speed

Wave intensity

Wavelength

Wave amplitude

Such substance which undergo plastic deformation until they break are known as.

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Diatomic substances

Monoatomic substances

Ductile substances

Brittle substances

The maximum distance between an object and its real image in case of convex lens is

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f

2f

2.5 f

4 f

A force of 20 N is applied on an elastic spring if the extension produced in the springs to cm, the value of spring constant.

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2 Nm-1

20 N m-1

200 N m-1

2,000 N m-1

The base unit of temperature in SI is

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Fahrenheit

Celsius

Kelvin

Rnakine

A single silicon photovoltaic cell produces a current of the order of.

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A few miliamperes

10² A

10³ A

10⁴ A

All particles, of a wave front vibrate

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In same phase

In opposite phase

Upward down

Left and right

Which quantity must be the same for two bodies if they are to be in thermal equilibrium.

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Internal energy

P.E

Temperature

Mass

With the increase of temperature, teh pitch of an organ pipe

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Increase

Descrease

Remain the same

May increase or decrease

Thermocouple is combination of.

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Thermocouples

Capacitors in parallel

Resistors in series

Ammeter and voltmeter

The magnitude of the resultant of two equal forces is equal to either to the force What is the angle between the two forces

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0 ^o

120 ^o

60 ^o

180 ^o

Which physical law expresses the relationship between the heat generated and the current through a conductor.

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Ohm's law

Kirchoff's law

Joule's law

Ampere's law

The number of 0.0001 is abbreviated correctly by

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1 x 10⁴

10^-3

10^-4

0.1 x 10⁴

The cause of production of eddy current is the

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Current flowing in a conductor

Current flowing in a insulator

Motion of a conductor in a varying magnetic field

Motion of an insulator in a varying magnetic field

When a following field is governed by Maxwell's equations.

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Electrodynamics

Optics

electric circuits

All of these

An object is placed at the focus of a diverging lens The image is located at

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The focus

2 F

Infinity

Half away between the lens and the focus

In a nuclear reactor chani reaction is controlled by introducing.

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Iron rods

Cadmium rods

Graphite rods

Platinum rods

If the image is virtual then its distance from the lens is taken.

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Positive

Negative

Double

Half

The wave phenomenon that classifies light as a transverse wave is.

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Polarization

Diffraction

Interference

Refraction

The centre of mass of a system is a point where an applied force causes the system to move.

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With rotation

Without rotation

Fastly

Slowly

Balmer identified the spectral lines in the spectrum of hydrogen in

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1785

1885

1936

1966

If the resultant of all the forces acting on a body is zero then the body is in

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Translation equilibrium

Rotational equilibrium

Equilibrium

Dynamic equilibrium

The kinetic molecular model of matter describe matter an being made up of molecules in continuous.

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Vibratory motion

Random motion

rotatory motion

Linear motion

A wave reflected from the boundary of a denser medium will have phase change

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45 ^o

60^o

90 ^o

180 ^o

If two non zero vectors are perpendicular to each other then their scalar product is equal to.

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-1

1

0

Infinity

What is used in an electric circuit to allow current in one direction only.

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A fuse

An ammeter

A diode

A relay

The velocity of the wave could be increased by

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Reducing the amplitude

Decreasing the frequency

Increasing the period

Stretching the spring more

Which animal did Erwin Schrodinger contemplate using in his famous thought experiment.

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mouse

Cat

Dog

Rabbit

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

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