Question # 1

The ionization potential of hydrogen atom is.

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10.2 V

13.6 V

12.97 V

27.2 V

In water drops rainbows are formed by

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Reflection

Refraction

Dispersion

All of these

Which of the following is an example of irreversible process.

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Melting of ice

Work done against friction

Pettier heating and cooling

All isothermal and adiabatic changes

What is term for tendency of a system to oscillate with larger amplitude at some frequencies than at others.

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Resonance

Impedance

Inductance

Capacitance

The relation between horse power and watt is.

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1 hp = 546 watts

1 hp = 746 watts

1 hp = 946 watts

1 hp = 1000 watts

A longitudinal sinusoidal wave has a wavelength of 1 cm and a period of 2s. Its wave velocity is.

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50 cm s-1

0.00t m s-1

100 cm s-1

5 m s-1

Positron was discovered by

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Wilson

Anderson

Dirac

Stefan

Which of the following is required for maintaining sustained chain reaction.

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Neutrons

Protons

Electrons

Photons

The graph between restoring force and time in SHM is a

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Straight line

Parabola

Sine wave

Circle

The angular momentum of a body about a fixed point is conserved if its velocity

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Decreases

Increases

Remain the same

Becomes zero

At what speed the mass of a body will be doubled.

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0.67 C

0.77 C

0.87 C

0.97 C

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

The rate of which blood is delivered to the patient in a transfusion depends on

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Hight of the blood level in the suspended container

Volume of the container

Shape of the container

Material of the container

If work must be done by an outside agent attempting tobring two point charges close together.

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They are of opposite signs

The field is not conservative

The work is recoverable when they separate

The P.E. of the charges is reduced by the amount of the work done

When two waves travelling through the same medium arrive at the same point 180 ^o out of phase, they give rise to.

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Polarization

Destructive interference

Refraction

Constructive interference

The terminal velocity in case of spherical droplet is directly proportional to.

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Square of the radius of the droplet

Radius of the droplet

Cube of the radius of the droplet

Half of the Radius of the droplet half

A particle executing simple harmonic oscillations of frequency 100 Hz has an amplitude of 0.1 cm The velocity amplitude of the particleis.

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20 micro cm s-1

10 micro cm s-1

20 cm s-1

19 cm s-1

A fixed pulley is emplyed to

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Do some work

Change the directionof force

Do more work with the same force but without using the pulling

Have mechanical advantage greater than 1

The internal resistance of a primary cell depends upon the.

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Current dawn form the cell

Concentration of the solution

distance between cell electrodes

All of the above

Which form of electromagnetic radiation is used in RADAR.

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Long wavelength ultraviolet waves

short wavelength microwaves

short wavelength infrared wave

Long wavelength radiowaves

halls fall faster than rain drops due to their

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Grater size

Greater mass

Greater area

Structure

If the cross sectional area of the pipe decreases the speed of the fluid increase according to.

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Venturi relation

Bernoulli's equation

Equation of continuity

Torriculli's theroem

A body of mass 2 kg is suspended in a elevator by means of a spring The balance reads its weight when the elevator moves up with an acceleration of 5 m s-2 as.

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9.8 N

29. 6 N

26.5 N

30.5 N

Which of the following is the ability to hold an electric charge in electromagnetism.

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Resistance

Impedance

Inductance

Capacitance

A body is equilibrium may not have

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Momentum

Velocity

acceleration

K.E.

An immersion heater rated at 150 W is fitted into a large block of ice at 0 oC. The specific latent heat of fusionism 300 J g-1. How long does it take to melt 10 g of ice.

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5 s

10 s

15 s

20 s

When a current of 2 A flows for 5 s through a lamp 120 W of power are used How much charge flows through the lamp.

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10 C

12 C

24 C

60 C

When a conductor situated in a dielectric is charted the energy resides.

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Only on the dielectric

Only on medium surrounding charge

On the dielectric and medium both

Only on the type of the charge

Induced current in a circuit depends upon

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The speed with which the conductor moves in the magnetic field

Resistance of the loop

Direction of the loop

Shape of the loop

The relation between angle of incidence and angle of refraction is known as.

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Snell's law

Refractive index

Index of refraction

All of the above

Shadow formation and the pin hole camera illustrate the

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Phenomenon of reflection

Phenomenon of refraction

Phenomenon of total internal reflection

Rectilinear propagation of light

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