Question # 1

The peak to peak value of alternating voltage is

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2V_o

V_o

None of these

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None of the above

Which pair belongs to hadrons.

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Protons and Neutrons

Neutrons and electrons

Photons and electrons

positrons and electrons

Lenz's law presented in

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1834

1934

1826

1836

Minimum number of semi conductor diodes required for full wave rectification are.

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1

2

3

4

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, Then

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The charge in the plates reduces and potencial difference increase

Potencial difference between the plates increase, stored energy decreases and charge remains the same

Potencial difference between the plates decreases, stored energy decreases and charge remains unchanged

None of them

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Binding energy per nucleon is maximum for

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Platinum

Iron

Uranium

Lead

When transistor are used in digital circuits they usually operate in the :

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Active region

Break down region

Saturation & cutoff regions

Linear region

Which device is used as a rectifier?

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Capacitor

Transistor

Diode

Transformer

The circuit of full wave rectification consist of

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Three diodes

Four diodes

Two diodes

One diode

Binding energy per nucleus for uranium is above:

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6.7 Mev

7.7 Mev

6.9 MeV

7.9 MeV

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

The effective value of any sinusoidal alternating current or voltage is

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None of the above

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

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

The photoelectric effect predicts that light is made of

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Photons

Neutrons

Protons

None of these

The direction of induced current is always so as to oppose the change which causes the current, this is the statement of

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Lenz's law

Faraday's law

Ampere's law

Coulomb's law

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