Question # 1

The energy of a photon is represented by

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h/c²

h/T

hc²

hf/c²

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

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minimum

maximum

zero

none of these

Plan of a coil makes an angle of 20º with the lines of magnetic field. The angle between B and vector area of plane of coil is:

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Also 20º

70º

90º

180º

None of these

Maximum height of a bullet when fixed at 30 with horizontal is 11 m. Then height when it is fired at 60° is

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22 m

6 m

33 m

7.8 m

A vector of magnitude 5 N is added to a vector of magnitude 8 N while the orientations are changeable. Range of their possible sum will be very from:

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Zero to 3 N

1 N to 13 N

13 N to 3 N

None of these

The time period of a simple pendulum is independent of its:

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Length

Mass

Value of g

Both A and B

In the formula B= µ̻ nl, the symbol n denotes:

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Total number of turns of solenoid

Number of turns per unit length

Number of turns per unit volume

Numbers of turns per unit area

Number of moles

The second law of thermodynamics is concerned with the circumstances in which

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heat can be converted into work

direction of flow of heat

none of them

both of them

The number of protons inside a nucleus is called

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mass number

atomic weight

atomic number

none of these

A convex lens acts as diverging lens when the object is placed:

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Between F and 2F

At 2F

With focal length

Beyond 2F

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

The vector product of two non zero vectors is zero when

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They are parallel to each other

They are perpendicular to each other

They are equal vectors

They are inclined at angle of 60°

The theory which explains the vast diversity in an electrical behaviour of all types the materials is

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Free electron theory

Band theory

Theory based as chemical properties

None of these

The force between two chares 0.06 m apart is 5N.If each charge is moved towards the other by 0.01 m,then the force between them will become

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7.20 N

11.25 N

22.50 N

45.00

In semiconductor Si or Ge a missing electron in covalent bond from an atom is a

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Charged atom

Hole

Ion

All of them

Which one of the following has only bulk modulus?

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Diamond

Glass

Tungsten

Water

Nm^-2 or Pa are the units of

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Stress

Strain

Modulus of Elasticity

a and b

A tritium and alpha particle enter the magnetic field with same kinetic energy, what will be the ratio of their radii?

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3:4

√3: 1

√3: 4

√3:√2

Shear modulus for ice is

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1.2

2.5

3

3.3

Which of the particles, electron, proton and neutron moving with same speed has longest wave length?

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Electron

Proton

Neutron

All have same

If red light is incident on sea water it appears

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Red

Green

Blue

Yellow

Mathematically the vertical velocity component is

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