Programed instructional material: Electricity

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Topic: ElecrticityClass: 10Medium: English

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Programmed Instructional material

Objectives

At the end of this module you will be able to-• recall the concept of electricity• define the term electromagnetic force• know about the nature of charge on electron

and proton

Let’s start module

ELECTRICITYThe ward electricity refers to the natural phenomenon known only by its effects like electric current, electric field and electromagnetism . Electricity or electric phenomena are caused by electric charges . charge is the fundamental property of material particles because of which they exert electric force on one another. Nature of charge on electron is negative and charge on proton is positive. Magnitude of charge of electron is -1.6/10(-19)c and charge of photon is +1.6/10(-19)c. S.I unit of charge which is called “coulomb”. similar charges repel each other and unlike charges attract each other. The material which loses electrons become positively charged(due to the presence of excess proton) and the material which gains electrons become negatively charged. Both the material will get equal amount of charges. Like charge repel and unlike charge attract each other and these force are called electrostatic forces.

Let’s answer some questions

Q1: Electricity is caused by…………..

Electrons

Protons

Electric charges

Electric field

B

C

D

A

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Q2: Nature of charge on electron is

Negative

Positive

Neutral

All of above

B

C

D

A

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Q3: Magnitude of charge of photon is

-1.6/10(-19)c

+-1.6/10(-19)c

+1.6/10(-19)c

1.6/10(-19)c

B

C

D

A

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Q4: S.I unit of charge is

Resistance

Ohm

Ampere

coulomb

B

C

D

A

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Current is measured in ampere and resistance is measured in ohm.

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Q5: Like charge repel and unlike charge attract each other and these force are called-

Electromagnetic force

Electric current

Electrostatic force

None of these

B

C

D

A

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