Question # 1

If a rope in a hand makes 10 oscillations after every 2 s. the frequency of the wave is.

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2 C s-1

5 C s-1

10 C s-1

20 C s-1

Mass -energy relation means that the product of mass times the square of the speed of light must be equal to.

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Torque

Momentum

Energy

Impulse

Which eye defect can be rectified by using diverging lens.

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Near sightedness

Far sightedness

presbyopal

Astigmatism

Torque is equal to.

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The product of magnitude of force and acceleration

The product of magnitude of force and momentum

The product of magnitude of force and displacement

The product of magnitude of force and angular velocity

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

Two convex lens focal length 'f' use din combination become telescope. When the distance between them is.

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1

4f

2f

f/2

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 electron behave an waves because

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They can be diffracted by a crystal

They can produce ions in gases

They can be deflected by magnetic field

They can be deflected by electric field

The sound waves used sonography are

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Less than 20 KHz

of 20 Khz

Greater than 20 KHz

Of 20 MHz

Under which of the following conditions current in a circuit is wattles.

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When inductance in the circuit is zero

When resistance in the circuit is zero

When current is alternating

When resistance and inductance both are zero

Which one of the following has maximum frequency.

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Visible light

Gama rays

Ultraviolet rays

Infrared rays

When light enters a denser medium

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Its speed slows down

Its speed increases

It is totally reflected

Its speed remains unchanged

House hold circuits are mostly

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Wired in sires

Wired in parallel

Made using wires of gold

Made using wires of silver

In the magnetic circuit concept the quantity analogous to electric current in electric circuit analysis is.

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Magnetic flux density

Permeability

Magnetic field intensity

Magnetic flux

The continuous X rays spectrum is due to an effect.

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Bremsstrahlung

Breaking radiation

Holography

both a and b

Which of the following solids exhibits only short range order.

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Amorphous solids

Polymeric solids

Crystalline solids

All of the above

A body is in a static equilibrium, only when it is

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Moving with uniform velocity

Moving with variable velocity

Moving with uniform acceleration

at rest

If we double both the current and the voltage in circuit while keeping its resistance constant the power.

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Remains unchanged

Halves

Doubles

quadruples

The path of projectile is maximum at

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Point of lauch

Highest point

Point of landing

Both a and c

Which term given below refers to the concept moving clocks run slower than clocks at rest w.r.t an observer.

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Simultaneously

Mass variation

time dilation

Length contraction

Vectors are ofhen spilt into two or more orthogonal components what is true of these components.

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they are perpendicular

They are parallel

They are antiparallel

They have same magnitude

Angular momentum of a body under a central force is

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Zero

Maximum

Minimum

Constant

Temperature of a system remains constant in

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Adiabatic process

Isobaric process

Isothermal process

Isochoric process

The point midway between the lens surface on its participial axis

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Optical centre

Principal focus

Focal plane

Focal length

Which term is used for the persistence of sound in a hall.

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Resonance

Acoustics

Symphony

Reverberation

Wave length of a LASER can be sued as a standard of.

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Angle

Time

Length

Temperature

What is the degree of magnetization of a material.

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Susceptibility

Ablitity

Retentivity

Capacity

Waves that have the same direction of vibration as their direction of travel are.

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Longitudinal waves

Transverse wave

Standing waves

hair wave

Laser light is considered to be coherent because it consists of.

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Many wavelengths

Uncoordinated wavelengths

Coordinated waves of exactly the same wavelength

Divergent beams

Why an even Carnot engine Carnot give 100% efficiency.

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We cannot find ideal sources

We cannot eliminate friction

We cannot reach absolute zero temperature

We cannot remove heat

The decay to form other nuclides by emitting particles and electromagnetic radiations by unstable nuclides is called.

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Nuclear stability

Radioactivity

Carbon dating

Spontaneously

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