Question # 1

The e/m of an electron moving in a circular path in a magnetic field is equal to

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V/Br

V/B²r²

V²/Br²

V²/Br

Ammeter is used to measure

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voltage

resistance

voltage and current

current

The distance travelled byα-particle in a medium before coming to rest, is called

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range ofγ-particle

range of neutrons

range of particle

none of these

The absolute temperature for an ideal gas is

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directly proportional to the rotational K.E of gas molecules

directly proportional to the vibrational K.E of gas molecules

directly proportional to the average translational K.E.of gas molecules

directly proportional to the P.E. of gas molecules

Bernoulli's equation is based upon law of conversation

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Mass

Momentum

Energy

None of these

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

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Disc, sphere

sphere, hoop

Thin rod, hoop

Hoop,disc

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinite work

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

1 amu is equal to

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-34kg

1.66 x 10^-27kg

Velocity of a body changes if

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direction of the body changes

speed of the body changes

neither speed nor direction changes

either speed or direction changes

According to Einstein, with the great increase in the speed of the body the relativistic length of the body

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Remains constant

Decreases

Increases

Reduces to zero

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory?

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Refraction

Reflection

Diffraction

Formation of spectrum

In Newton's rings the thickness of air film at the point of contact is

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maximum

minimum

equal to wavelength

zero

If the wavelength of light used in Michelsion's interferometer is 400 nm and the moveable mirror only moved throughλ/4, then the length moved will be

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10 nm

10^-2mm

1 nm

10^-4mm

The unit of thermodynamic temperature scale is.

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Kelvin

Celsius

Fahrenheit

None of these

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be

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6 x 10^-5rad

7 x 10^-5rad

8 x 10^-5rad

None of these

A geometric shape of a solid obtained by regular, respetive, three-dimensional arrangements of its molecules,atoms or ions is called a:

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Crystal

Crystal Lattice

Crystal plane

None of these

Electrical activity of the retina the eye, generates which is used in electro ethnography as

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Current

Voltage

Resistance

None of these

Length of a metal cylinder with the help of a vernier callipers of least count 0.01 cm is 5.35 cm. Its percentage uncertainty in length is

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2%

2.3%

0.2%

0.3 %

When crest of one wave falls on the crest of the other wave. This phenomenon is known as:

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Destructive interference

Diffraction

Polarization

Constructive interference

The locus of all the points in the same phase of vibration is called:

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Wave packet

Wavefront

Wave number

None of these

There is a regular arrangement of molecules in

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amorphous solids

polymeric solids

crystalline solids

none of these

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