Question # 1

Public address system is the example of :

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Analogue electronics

Digital electonics

Binary system

None of these

Electroscope is used for detecting:

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Current

Charge

Voltage

Resistance

Earth wire is connected to the:

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Power house

Transformer

Ground

Generator

1 Pico farad is equal to:

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10^-9F

10¹²F

10^-12F

10^-6F

To protect the gold leaves of electroscope from the external electric disturbances, the aluminum foil is grounded by a thin wire, which is made up of:

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Aluminum

Silver

Copper

Brass

One coulomb is equal to charge of electrons:

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6.25x10^-19

6.25x10¹⁹

6.25x10¹⁸

6.25x10^-18

The two inputs of a NAND gate are A and B. Its output would be zero when:

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A = 0, B = 0

A = 1, B= 0

A = 1 , B = 1

A = 0 , B = 1

If we double the distance between two charges, then force becomes:

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4-times

¼ th

Double

Half

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

Capacitors that are used in resonant circuits that tune radios to particular frequencies, such circuits are called:

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Series circuits

Filter circuits

Parallel circuits

AC circuits

When a positive charge of 2 coulombs is placed at a point in an electric field, it experiences a force of 6N. The intensity of electric field at this point is:

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6 NC^-1

3 NC^-1

12 NC^-1

1.5 NC^-1

The output of OR gate would be '0' When:

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Both of its inputs are zero

One of its two inputs is zero

Both of its inputs ar 1

Any one of its inputs is 1

The converter of analogue to digital signal is:

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ADC

DAC

ATDC

None of these

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