Electric circuits physics paper 1 p4

Why does an atom have no charge?

Be cause it has an equal number of positive protons and negative electrons

What happens when electrons are removed from an atom?

It becomes positively charged

What happens when electrons are added to an atom?

It becomes negatively charged

What is the unit of current?

Amp (A)

What is electric current?

When charge flows

What is potential difference?

It is a measure of how much energy is transferred from two points

What does a series circuit look like?

Components are all connected together in a single loop.

What happens when one thing in a series circuit stops working?

The whole thing stops working

What does a parallel circuit look like like?

It is made up of two or more loops

What happens if one branch in a parallel circuit stops working?

The other branches will not be affected

What must be in a closed circuit so that electrical charge can flow?

A source of potential difference

What happens to the current if the resistance is increased but the potential stays the same?

Current decreases

Draw a cell

Draw a two cell and three cell battery

Draw a bulb

Draw an open switch

Draw a motor

Draw a fixed resistor

Draw a variable resistor

Draw a fuse

Draw a diode

Draw a thermistor

Draw a light emitting diode

Draw an ammeter

Draw a voltmeter