Question # 1

The relationship between mass number atomic number and neutron number is.

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A = Z + N

A = Z - N

Z = A + N

N = Z - A

Which of the following quantities is zero about the centre of mass of body.

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Mass

acceleration

Moment

Angular acceleration

The total energy of a body executing SHM is directly proportional to

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The amplitude

The square of the amplitude

Square root of the amplitude

Reciprocal of the amplitude

When a diamagnetic substance is inserted in a current carrying coil the magnetic field is

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Decreased

Increased

unchanged

Increased or decreased, depending upon the relative volume of the substance

If a wave vibrate 10 times in 1 s with a speed of 10 m s-1 the correct wavelength of the wave is.

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1 m

10 m

20 m

100 m

In onw cycle of a steam engine there are how many dead centres.

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1

2

3

zero

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

What is a thermal properly of a material that determines the quantity of energy required to change the phase of a unit mass of that substance.

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Specific heat

Latent heat

Internal energy

Specific energy

Conductance is the reciprocal of

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Inductance

Capacitance

Resistance

Admittance

Which of the following measures how quickly the thermometer liquid mainly because it

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Is coloriess

Is a bad conductor of heat

Does not expand linearly

Has a low boiling point

Light wave are

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Longitudinal

Transverse

Sometimes longitudinal and sometimes transverse

Neither longitudinal nor transverse

If a wave vibrate 10 times in 1 s with a speed of 10 m s-1 the correct wavelength of the wave is.

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1 m

10 m

20 m

100 m

In which form energy is stored in acondenser.

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Electric energy

Potential energy

Kinetic energy

Magnetic energy

A body is equilibrium may not have

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Momentum

Velocity

acceleration

K.E.

If the period of a wave motion is 2 s and the wave speed is 4 cm s-1 then its frequency is

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1/8 C s-1

1/2 C s-1

2 C s-1

8 C s-1

Neither the position nor the momentum of a particle can be predicted with arbitrarily great precision is the statement of.

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Archimede's principle.

Heisenberg uncertainty principle

Mosley's law

Schrodinger's wave equation

Which of the following is a thermodynamic potential

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Internal energy

Enthalpy

Gibb's free energy

All of these

An Electric kettle should always be fitted with an earth connection as a protective device What is being protected by the earth connection.

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The cable connecting the kettle

The fuse in the circuit

The heating element of the kettle

The person using the kettle

The instantaneous voltage across a pure inductance.

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Leads the current by 90 ^o in phase

Lags the current by 90 ^o in phase

Is in phase with the current

Leads the current by a phase angle which depends on the frequency

The back ground radiation in the atmosphere on the average is

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0.5 Sv per year

1.0 Sv per year

1.5 Sv per year

2.0 Sv per year

The SI unit of stress is

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kg m s-2

kg m-1 s-2

N m-2

N m-1

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

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Neutrons

Protons

Electrons

Photons

What is the traditional name for a capacitor

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Choke

Condenser

Transformer

Inductor

If a gas does 10 J of external work white expanding then the change in internal energy is equal to.

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0 J

10 J

-10 J

100 J

Which of the following is a method of energy transfer.

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Conduction

Wave motion

Radiation

All of these

A uniform vertical wire is stretched by hanging a mass from its lower end Which of the following does ot effect the strain in the wire.

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The stress

The upstretched length

The load applied

the Young's modulus of the metal

Which of the following are defects in human eye.

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Myopia

Hypermetropia

Presbyopia

All of these

The gravitational strength on the surface of moon is 1.6 N kg-1 What will be the mass and weight of an object respectively on the surface of the moon.

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10 kg , 1.6 N

10 Kg , 16 N

16 Kg, 10 N

16 kg, 160 N

A water wave is an example of.

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Transverse wave

Longitudinal wave

Hair wave

Shock wave

In a diffraction pattern, the width of any fringe is.

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Directly proportional to slit width

Inversely proportional to slit width

independent of slit width

Zero

Newton's rings are formed due to

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Diffraction of light

Interference of light

Polarization of light

Reflection of light

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