Question # 1

Which one of the following paved the way for modern physics

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Newtonian mechanics

Theory of relativity

Quantum theory

All of above

Which of the following series of hydrogen spectrum lies in ultra violet region.

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Lyman sereis

Paschen series

Balmar series

Bracket series

The electric field created by positive charge is:

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Radially outward

Circular

Radially inward

Zero

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

X_L=

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2πfL

1/2πfL

2πfL

fL/2π

The first spectral lines were discovered in 1885, were

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Paschen series

Balmer series

Pfund series

Bracket series

The SI unit of relative permittivity is.

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Fm-1

C2N-1m-2

Nm2C-2

No unit

If the number of turns become double but length remain same, then magnetic field in the solenoid become.

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Half

Double

Remain same

Zero

The Basic circuit element in a D.C. circuits which controls the current and voltage is

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Resistor

Inductor

Capisitor

Transistor

Minimum energy needed to escape an electron ofrm metal surface is called:

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Threshold energy

Threshold frequency

Work function

Work ability

Energy needed to produce an electron hole in solid state detector is.

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1 to 2 eV

3 to 4 eV

6 to 7 eV

8 to 9 eV

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

The free electrons experience force.

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In direction of -E

In direction of E

Both A and B

All of the above

In full wave rectification number of diodes required are equal to.

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2

3

4

5

Which one of the following resistance is used to convert a Galvanometer into an ammeter.

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High resistance

Low resistance in series with galvanometer

Shunt

High resistance in series with galvanometer

The output of two input is zero only when its.

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Both inputs are zero

Either input is zero

Both inputs are one

Either input is one

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