Question # 1

The electrostatic force acting on two charges each of 1C separated by 1m is about:

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9X10⁹ N

9X10^-9 N

9X10⁸ N

9X10^-8 N

Power of hair dryer is:

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1000 W

750 W

10 W

75 W

Those quantities whose values do not remain constant are called:

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physical quantities

Digital quantites

Log quantities

Analog quantities

Digital technology is used in:

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Bulb

Radar

Electric motor

All of these

The digits used in electronics are:

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1

0

0 and 1

1 and 2

Two switches attached in series work on which operation?

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AND operation

OR operation

NOT operation

NOR operation

The process by which electrons are emitted by a hot metal surface is

known as:

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Boiling

Evaportion

Conduction

Thermionic emission

The output of a NAND gate is 0 when

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Both of its inputs are 0

Both of its inputs are 1

any of its inputs is 0

any of its inputs is 1

Which type of capacitor is cylindrical in shape:

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Paper capacitor

Mica capacitor

Variable capacitor

Plates capacitor

What does a switch do:

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Oppose the current

Open and close the circuit

Store energy

Provide voltage

The converter of analogue to digital signal is:

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ADC

DAC

ATDC

None of these

For the emission of electrons from the tungsten filament the values of current and voltage are taken as:

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0.1 A and 2V

0.2 A and 4V

0.3A and 6V

0.4A and 8V

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