Y8 Electricity

Which of these circuits are parallel circuits?

• A: X and Y only

• B: X and Z only

• C: Y and Z only

• D: All of them

Which switches must be pressed for bulb X to come on?

• A: All three of them

• B: 1 and 2 only

• C: 1 and 3 only

• D: 2 and 3 only

Parallel circuits are used for house lights:

• A: so they can be switched on and off together

• B: so you know when one breaks, because all the others go off

• C: so they use a bigger current

• D: so they can all be switched on and off separately

Which of these statements is not true?

• A: The current at Q and R add up to give the current at S

• B: The current is the same at P and S

• C: The currents is the same at Q and R

• The current is the same at P and Q

What is the rule for current in a parallel circuit?

• The current is the same everywhere in the circuit

• The total current in a parallel circuit is the sum of the currents flowing through each parallel branch.

• The total current is divided equally for each branch

• There is no rule it's always different

127. What moves in wires to give a current?

• Electric waves

• Neutrons

• Protons

• Electrons

Why do bulbs light up when the charges move through them?

How is an ammeter connected into the circuit?

• Parallel or in series, it doesn't matter

• Parallel

• In series

• Not sure

Explain what happens to the current when we put additional components in a series circuit?

Draw a parallel circuit which has a battery, 3 bulbs, an ammeter which measures the total current in the circuit and a second ammeter which measures the current on one of the branches.