# Programed instructional material: Electricity

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Topic: ElecrticityClass: 10Medium: English

Lets start moduleProgrammed Instructional material

ObjectivesAt the end of this module you will be able to-recall the concept of electricitydefine the term electromagnetic forceknow about the nature of charge on electron and protonLets 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.

Q1: Electricity is caused by..ElectronsProtonsElectric chargesElectric fieldBCDA

Hint!

Q2: Nature of charge on electron isNegativePositiveNeutralAll of above

BCDA

Congratulations you have selected Right Answer!

Hint!

Hint!

Q3: Magnitude of charge of photon is-1.6/10(-19)c+-1.6/10(-19)c+1.6/10(-19)c1.6/10(-19)c

BCDA

Q4: S.I unit of charge is ResistanceOhmAmperecoulomb

BCDA

Hint!

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

Q5: Like charge repel and unlike charge attract each other and these force are called-Electromagnetic forceElectric currentElectrostatic forceNone of these BCDA

Congratulations you have Scored 50 marks!

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