Question # 1

If the distance between two point charges is reduced to half, the coulomb’s force become:

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Half

Two times

One fourth

Fourth times

1 Nano farad is equal to:

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1X10^-12F

1X10⁹F

1X10^-9F

1X10^-6F

Value of ‘k’ depends upon:

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System of unit

Nature of medium

Both a and b

None of these

Those quantities whose values do not remain constant are called:

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physical quantities

Digital quantites

Log quantities

Analog quantities

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 open switch Boolean expression is represented by:

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0

1

10

2

What does a switch do:

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Oppose the current

Open and close the circuit

Store energy

Provide voltage

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

Each volt of lightening contains energy:

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4x10⁶ joules

1000 joules

1000 million joules

10 joules

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

The amount of current that can be painful is:

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0.005A

0.001A

1A

2A

If X = A,B, then X is 1 when:

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A and B are 1

A or B is 0

A is 0 and B is 1

A is 1 and B is 0

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

known as:

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Boiling

Evaportion

Conduction

Thermionic emission

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Physics 10th Class English Medium Unit 7 Online Test MCQs With Answers

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