Question # 1

If the ionization energy of hydrogen atom is 13.6 eV, its ionization potential will be

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136.0 volt

3.0 volt

13.6 volt

None of these

Electromagnetic induction obeys law of conservation

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Charge

Energy

Momentum

Mass

A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when:

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q=Q/4

q=Q/2

q=Q

None of these

Intensity of field inside a hollow charged sphere will be.

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Negative

Unaffected

Zero

Maximum

A dot represents the direction of magnetic field.

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Out of page

Into the page

Tangent to page

Parallels to page

The mass spectrum of naturally occurring neon, showing

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1 isotope

2 isotope

3 isotope

4 isotope

The minimum frequency needed to emit an electron form metal surface is called:

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Work function

Threshold frequency

Quanta frequency

All of above

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

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6 months

8 months

12 months

16 months

When platinum is heated is become dull red at:

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900°C

500°C

800°C

1100°C

The first spectral lines were discovered in 1885, were

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Paschen series

Balmer series

Pfund series

Bracket series

If 10 A current passes through 100 mH inductor, then energy stored is.

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100 J

5 J

20 J

Zero

Which one is not a crystalline solid.

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Zinc

Copper

Nylon

None of these

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

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Resistor

Inductor

Capisitor

Transistor

The unit of induced emf is

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Ampere

Volt

Joule/coulomb

Both (b) and (c)

Conversation of only one half of A.C. into D.C. is called.

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Half wave amplification

Wave amplification

Half wave electrification

Half wave rectification

Which is not fundamental logic gate.

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NOT

AND

OR

NAND

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these

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