Question # 1

A force of 0.01 N is exerted on a charge 1.2 x 10^-5 C at a certain point. The electric field at that point is

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1.2 x 10⁴ N/C

1.2 x 10⁴ C/N

8.3 x 10² N/C

8.3 x 10^-2 N/C

The expression P = VI hold only when current and voltage are.

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In phase

Out of phase

At right angle to each other

At angle of 120 ^o

Semiconductors have conductivity of order:

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10^-8 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10² to 10⁵ (Ωm)^-1

10^-5 to 10^-7 (Ωm)^-1

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

Yield stress is another name of

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Plasticity

Proportional limit

Elastic limit

Both (b) and (c)

The particles equal in mass but greater than proton are.

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Mesons

Baryons

Leptons

Hadrons

Two opposite point charge of same magnitude separated by distance 2d, electric potential mid way between them is.

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1 V

2 V

Zero

V/2

The phase angle of a series RLC circult at resonant frequency is

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1/2

sigma

Zero

sigma /4

Which of the following is one of the spectral series of atomic hydrogen?

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Brockett series

Balmer series

P fund series

All of above

the number of terminals in a semiconductor diode are

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2

3

4

5

For non-ohmic devices, the graph between V and I is

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Not a straight line

A straight line

A curve

All of above

The longest wavelength of Paschen series is.

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656 nm

1094 nm

1875 nm

2000 nm

Main reason for world wide use of A.C. is

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It is cheaper

Transmitted

Botha a and b

Reaches in short time

A wire stretched to double of its length, its strain is:

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2

1

0

0.5

Which of the following does not undergo plastic deformation.

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Copper

Wrought iron

Head

Glass

The bnding energy for nucleus A is 7.7 Me V and that for nucleus B is 7.8 MeV. Which nucleus has the larger mass?

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Nucleas A

Nucleus B

Less than nucleus

None of these

Energy band theory is based upon

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Hund's Rule

Heisenberg uncertainty principle

Bohr's atomic Model

Wave mechanical model

For which material medium, force between two charged particles is maximum.

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Ammonia

Germanium

Mica

Teflon

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