Question # 1

____________ is always virtual in case of convex mirror.

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p

image

object

all of these

Magnification of mirror is given by:

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m=p/q

m=q/p

m=pxq

m=1/p+q

Electron gun has an electrode called for controlling the flow of electrons in the beam:

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Plate

Grid

Screen

Filament

The half -life of carbon is

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5730 years

5700 years

5720 years

572 years

In C.R.O grid is always connected with potential:

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Negative

Positive

High positive

Zero positive

The process of breaking a heavy nucleus after the bombardment of neutrons into two small nuclei is called:

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Nuclear fission reaction

Nuclear fusion reaction

Nuclear Radiation

Nuclear chain reaction

A thermistor is a dependent resistors:

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Heat

temperature

energy

mass

Volt is named after the Italian physicist:

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Faraday

Alessandro volta

Newton

Coulomb

Which is not a hardware:

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CPU

Window

Keyboard

Mouse

the distance between two consecutive trough or crest is called:

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wavelength

frequency

time period

amplitude

At extreme position potential energy of the pendulum is

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Maximum

Miimum

a and b

zero

The unit of spring constnat is:

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m

kg

Nm²

Nm^-1

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

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