Question # 1

Two forces each of 10 N magnitude act on a body It the forces are inclined at 30 ^o and 60 ^o with x-axis, then the x-component of their resultant is.

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10 N

1.366 N

13.66 N

1.35 .6 N

The rate of change of momentum of a body falling under gravity is equal to its.

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P.E.

K.E

Weight

Density

The field inside a hollow spherical conductor is.

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Constantin zero

Constant but not necessarily zero

A function of charge on sphere

a function of distance from the centre

Which law states that the angle of incidence equals the angle of refraction.

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Law of reflection

Law of refraction

Snell's law

Hygens's principle

The unit generally used for measuring astronomical distances is.

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Parsecs

Light year

Metre

Kilometer

A rod of refractive index 1.42 is immersed in a liquid of refractive index 1.42 the rod will

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Become invisible

appear slightly bent

Appear slightly raised

Reduce its refractive index

Clouds are white because they efficiently scatter sunlight of all

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Colours

Wavelengths

Frequencies

Phases

The typical value of forbidden energy gap in germinium is.

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0.7 eV

1.0 eV

1.4 eV

10 eV

We can hear beats when the difference in the frequencies of two sounding bodies is not more than.

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2

4

6

10

The product of mass and specific heat of a substance is called.

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Latent heat

Water equivalent

Atomic heat

Heat capacity

A device used to measure the strain of an object and it is a type of resistor that changes value with applied strain is a

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thermistor

Strain gauge

Thermocouple

Potentiometer

The special theory of relativity was presented in 1905 by

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Young

Planck

Schrodinger

Einstein

The word amorphous means

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With regular structure

Without structure

May have regular structure

Thermoplastics

If a force of 50 N is acting along x axis , then its component along y-axis will be.

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Zero

The same

Of the half magnitude

Of the double magnitude

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

The Circular motion of a particle with constant speed is.

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Periodic and SHM

Periodic but not SHM

linear and SHM

Neither periodic nor SHM

Which electrical component uses a low current circuit to switch a high current ON or OFF.

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Capacitor

Diode

Reed rely

Thermistor

The temperature of 1 kg of hydrogen gas is the same as that of 1 kg of helium gas if.

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The gases have the same internal energy

The gas molecules occupy equal volumes

The gas molecules have the same root mean square speed

The gas molecules have same mean translational K.E.

The continuous X rays spectrum is due to an effect.

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Bremsstrahlung

Breaking radiation

Holography

both a and b

Velocity of sound in air at a given temperature.

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Increases with increase in pressure

Decrease with increases in pressure

Is independent of pressure

Becomes quadruples

Which of the following is a unit of electric field strength.

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c m-1

v m-2

N C-1

N V-1

Which of the following propagates at the same speed as velocity of light.

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Heat waves

Sound waves

Shock waves

Beta particles

Direct current generators use.

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Coiled rings

Split rings

slip rings

solenoid rings

Sound wave in air are

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Longitudinal waves

Transvers waves

Electromagnetic waves

Matter waves

Nuclear force exists between

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Proton proton

Neutron -neutron

neutron -proton

All of these

a 2,000 kg heavy truck travelling at 36 km h-1 strikes a tree and comes to a stope in 0.1 s The average force on the truck during the crash is.

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2 x 10² N

2 X 10³N

2 X 10⁴ N

2 X 10³ N

Some concept of static electricity were introduced by.

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Chinese

Plato

Thales

Archimedes

Monochromatic light passing through a thick prism is.

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Polarize

Disperesed

Diffracted

Deviated

A battery drives 50 C of charge round a circuit. The total work done is 750 J What is the electromotive force of the battery.

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0.07 V

15 V

700 V

1500 V

Electric Heater operates on the principle of.

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electromagnetism

Electromagnetic induction

Electrolysis

Momentum

Which of the following devices can be used to produce both transvers and longitudinal waves.

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A string

A ripple tank

a helical spring

A turning fork

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