Question # 1

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

The effective value of any sinusoidal alternating current or voltage is

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None of the above

Nuclear fission was discovered by:

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Otto Hahn

Friz strassmann

Both a and b

Michaelson

If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.

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Half

Two

Four times

One fourth

Dielectric constant _εr for air is:

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1

1.006

1.0002

1.0006

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be:

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Neutral

Forward biased

Reversed biased

None of above

Controlling rods inserted into the reactor are of metal:

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Aluminium

Cadmium

Magnesium

Copper

One henry is equal to

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1 ohm x 1 sec

1 ohm x 1 hertz

1 ohm x 1 metre

All of above

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

When a conductor moves across a magnetic field an emf is set up this emf is called.

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Variable emf

Constant emf

Back emf

Induced emf

The number of electrons in one coulomb charge is equal to

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6.2 x 10¹⁸ electrons

Zero electrons

1.6 x 10^-22 electrons

6.2 x 10²¹ electrons

Impedance is denoted by:

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A

Z

P

Q

In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of.

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90^oC

Zero

120^oC

45^oC

A device that shows the visible path of ionizing particle is called.

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GM counter

Solid state detector

Scalar

Wilson cloud chamber

if time constant in RC series circuit is small, then capacitor is charged or discharged.

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Slowly

Rapidly

At constant rate

Intermittently

Frequency of x-rays depends upon.

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Number of electrons striking target

Accelerating potencial

Nature of the target

Both B and C

When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as.

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Photoelectric effect

Piezo electric effect

Thermionic emission

Secondary emission

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