7/24/2019 Review Sheet for Electric Charge and Circuits

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Review Sheet for Electric Charge and Circuits

To make use of electricity a complete _______________ is needed. Electrical energy can be

transferred around a complete circuit by an electrical ________________.

This can be read on an ammeter.

Electrical current has the symbol ___ and the unit ________. These have the symbol ____.

This electrical current is a flow of electric ______________ , made up of many negative_________________ .

The symbol for electric charge is Q and its units are __________________ that have the symbol C.

If one coulomb per second is flowing then a current of one ampere is

flowing.

They are connected into the euation I ! Q " t #here t stands for

__________ in seconds.

There are $ types of electrical circuit _____________ and_________________.

In a series circuit the current has no choice of path and has to flow

through each component in turn before returning to the supply %cell " battery or power supply unit

%&'()).

T*E C(++ET I - 'E+IE' CI+C(IT I' T*E '-E -T -// &0IT'

In a parallel circuit the current splits up and then 1oins back up before returning to the supply.

T*E C(++ET I - &-+-//E/ CI+C(IT '&/IT' (&. 0+E C(++ET 2/0#' 30# T*E &-T*

#IT* T*E /E-'T +E'I'T-CE.

The same current that flows out of the supply ('T flow back to it.

It is the electrical current that causes electrocution.

&oor insulation around wires can cause fires as current always causes a heating effect.

0verloading sockets " power boards " e4tension leads can cause too large a current to flow.

3amp conditions can make it easier for a current to flow %to earth). ake sure 50( are 0T the easiest path.

Electrical charges are free to move in conductors.In insulators %plastic, wood, air) the charges can be separated and this results in

static charging of ob1ects.

There are $ types of static charge, ________________ and ____________________ .

0/5 T*E E6-TI7E C*-+6E' 07E E7E+ T*E &0'ITI7E C*-+6E'.

The charges can be separated by rubbing insulators together, by the force of _______________.

0r by bringing a statically charged ob1ect close to an uncharged %neutral) ob1ect. This is called C*-+6I6 by

I3(CTI0.

'tatic charges can be made use of in photocopiers, ink 1et printers, paint spraying, and cleaning the fumescoming out of factory chimneys.

These charges also cause ha8ards in plane and car refuelling, in dusty atmospheres and when lightning strikes