7J Revision Quiz

a) Cell b) Buzzer c) Capacitor d) Battery

Which materials are good conductors? Glass Plastic Metals Wood

When current is high in a current, resistance is: Low The same

Resistance is: Current x voltage The opposing force which stops current from flowing Increased when you add more components All of the above

a) b) c) d)

If a short, thick wire has a lower resistance than a short, thin wire If a short, thick wire has a lower resistance than a short, thin wire. At the same voltage, the thick wire circuit will have: a) A lower current than the thin wire b) A higher current than the thin wire c) A lower voltage than the thin wire d) A higher voltage than the thin wire

What is the reading on the second ammeter?

What two things can happen when a person has a bad electric shock What two things can happen when a person has a bad electric shock? Write down 2 answers: a) Your hair goes all frizzy b) You can’t walk any more c) The heart can stop and nerves can be damaged d) There is no lasting damage

The job of this component is to: a) Make sure the electrons flow b) Complete the circuit c) Push the electrons round a circuit and give them energy

What current shows on each branch of the parallel circuit?

The human body has a high resistance. If a person gets an electrical shock of 15V, only a small current flows through the person. Why would they have a much worse shock with 230V? A low current flows through the person’s body with 230V A much higher current flows with 230V There is a much higher resistance