Question # 1

The number of wavelength of waves passing through a point in one secnd is called:

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Time period

Cycle

Frequency

None of these

1 Pico farad is equal to:

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10^-9F

10¹²F

10^-12F

10^-6F

Current is equal to:

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IR²

CV

Q/t

IR

Mathematical form of Ohm's law is:

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V = IR

V = I2R

V = Qt

V = IR2

The oscillations of a system in the presence of which force are called damp oscillations:

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Resistive force

Attractive force

Coulomb force

Both a and b

Eight bits combine to form:

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A byte

Megabyte

Kilobyte

Gigabyte

Bats can hear sound of frequency up to:

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100,000Hz

25000Hz

120, 000Hz

1000Hz

Which device is used to show the change in the value of current or electrical potential as a graph?

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Cathode ray tube

Electron gun

Oscilloscope

Transformer

Transformer which increase voltage is called.

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Step-up transformer

Step down transformer

D.C.Moter

A.C.genrator

The true ratio of a transformer is 10. It means:

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Vs = 10Vp

Ns = Np/10

Ns = 10NP

VS= Vp/10

In 1950, physicists observed that in cathode ray tube a special type of rays produced from cathode, these rays were called:

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Cathode rays

X-rays

Alpha rays

Gamma rays

When an electric current passes through a conductor, which field is produced around it?

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Electric field

Magnetic field

Gravitational field

Electrostatic field

Positive charge can be produced by:

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Combing in hair

Rubbing glass rod on silk

By rubbing ebonite rod on wool

By rubbing glass rod wool

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