Question # 1

To designate the voltage as low or 0 by a logic gate, the specified minimum value is:

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0.2 volt

0.8 volt

0 volt

2.0 volt

5.0 volt

In the equation E=mc²value of c is:

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1,86,000 miles per hour

1,86,000 miles per sec

3 X 10⁸m/sec

Both A and C

Both B and C

Wave length of light, on the average, is given by:

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10^-14_m

10^-10_m

10^-6_m

10^-4_m

Most practical applications of electricity involve

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Charges at rest

Charges in motion

Electrons at rest

Atoms in motion

Molecules in motion

Examples of polymeric substances are:

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Plastic

Synthetic rubbers

Zirconia

All of these

Both (A) and (B)

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

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2V

3V

0.5V

V

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

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Two

1/2

Zero

3/2

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

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Energy only

Momentum only

Mass only

Charge only

Both (A) and (B)

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

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A - Z

A

Z

A + Z

de-Broglies hypthesis was experimentally verified by

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Maxwell

Compton

Einstein

Davison and Germer

To and from motion of a body about its mean position is known as:

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Translatory motion

Vibratory motion

Rotatory motion

None of these

As isolated system in which

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No internal force acts

No external force acts

No internal and external force acts

None of these

A ball whose kinetic energy E, is thrown at an angle of 45° with horizontal,its kinetic energy at highest point of flight is

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E

E / √2

E/2

Zero

Electromagnetic waves transport:

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Energy only

Momentum

Both A and B are correct

None is correct

Stoke's Law holds for bodies having

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Elliptical shape

Spherical shape

Curved shape

None

The capacity of a parallel plat capacitor depends on the

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Type of metal used

Thickness of plates

Potential applied across the plates

Separation between the plates

Which of the following is non-conservative field

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Gravitational field

Frictional field

Electrostatic field

None of these

The velocity of light in vacuum can be changed by changing

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Frequency

Amplitude

Wavelength

None of these

For obtaining appreciable extension,the wire should be:

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Short and thin

Long and thin

Short and tick

Long and thick

Compton Effect makes the use of the law of conservation of:

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Energy

Momentum

Charge

Both (a) & (b)

A diffraction pattern is obtained using a beam of red light What will happen if the red light is replaced by blue light?

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No change

Diffraction bands become narrower and crowded together

Bands become broader and farther apart

Bands disappear

An airplane flies 400 m from north and then files 300 m south and then flies 1200 m upwards then net displacement is

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1200 m

1300 m

1400 m

1500 m

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