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+ ve

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CHARACTERISTIC

+ + --

REPEL REPEL

+ -

ATTRACT

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RATE OF FLOW OF CHARGE

A

CHARGE(Coulombs)

C

TIMEs

- ve+ ve

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O VAN DE GRAFF GENERATOR

E1

P SWITCH ON

THE PERSPEX ROLLER ROTATE

E2 BELT MOVE-FRICTIONBETWEEN BELT & ROLLER

CHARGE BUILT ON DCOLLECTING METAL SPHERER

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D

REGION IN SPACE WHERE

CHARGE PLACEEXPERIENCES FORCE

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Example:If the current which flows through

a bulb within a minute is 1.5 A.Calculate the electric charge that has

flowed within a minute.

Formulae: Q = ItGiven: I = 1.5 A Find: Q = ?

t = 1 minute

= 60 s

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AssessmentsObjective Questions

If a charge of 300 C flows through a bulbevery 2 minutes. Calculate the current whichflows through that bulb.

A 2.0 A B 2.5 AC 150 A

D 600 A

1 B

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There are 5 x 1018electrons flow through a

bulb within 20 seconds. What is the value ofcurrent flow ?

( Given e= 1.6 x 10-19 C )

A 40 mA B 0.8 A C 16 A

D 80 A

2 A

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O

P1

E1

COATED BALL

HIGH TENSION SUPPLYIS SWITCH ON

BALL DIDNT MOVE

P2

E2

R

BALL PUSH -VE PLAT

RECEIVE

VE CHARGEFROM PLAT

REPELL +VE PLAT

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RESISTANCE

POTENTIAL DIFFERENT

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POTENTIAL DIFFERENT

ENERGY/WORK DONELIBERATED WHEN 1COULOMB CHARGE

FLOWS ACROSS 2 POINT

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PROPERTY OF

SUBSTANCE THATHINDERS THE FLOW

OF ELECTRIC

CURRENT IN ACONDUCTOR

RESISTANCE

D

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ELECTROMOTIVE FORCE(EMF)

D

TOTAL ENERGY suppliedby a cell TO MOVE A UNIT

of ELECTRIC CHARGEfrom ONE TERMINAL tothe other through CELL

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E

DRESISTANCE WITHIN ACELL OR SOURCE OF

ELECTRICITY

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ENERGY

SUPPLIED by aSOURCE of

ELECTICITY such

as CELL whenCURRENT FLOWin CLOSECIRCUIT

ENERGY

CONVERTED byELECTRICAL

APPLIANCE into

another FORMOF ENERGYwhen CURRENT

FLOW

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E = QVENERGY

CHARGEPOTENTIALDIFFERENT

E = VIt

E = I2

RtE =

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POWER

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