Core questions – Physics unit 2 - Electricity

How is energy transferred by electrical working?

• It flows in an electrical circuit

• It is carried by sound waves

• It is transferred by heating only

• It moves through chemical reactions

What is electrical current?

• The rate of flow of electrical charge

• The amount of energy stored in a battery

• The resistance offered by a conductor

• The voltage across a circuit

In most circuits, what is the charge that flows to carry the current?

• Electrons

• Protons

• Neutrons

• Photons

What is needed for electrical charge to flow through a closed circuit?

• A source of potential difference.

• A switch in the open position.

• An insulator in the circuit.

• A broken wire in the circuit.

What is a circuit diagram?

• Simplified circuit drawings using symbols

• A list of electronic components

• A written explanation of a circuit

• A photograph of a circuit board

What is a series circuit?

• A circuit where all of the components are connected in one loop.

• A circuit where all components are connected in parallel loops.

• A circuit that only contains switches.

• A circuit that does not allow current to flow.

Identify the correct diagram of a series circuit containing a cell and a bulb.

• A diagram showing a cell connected in series with a bulb

• A diagram showing two bulbs in parallel with a cell

• A diagram showing a cell not connected to any bulb

• A diagram showing a bulb connected in parallel with a cell

What is the parallel circuit?

• A circuit where there is more than one loop of components.

• A circuit where all components are connected in a single loop.

• A circuit that does not allow current to flow.

• A circuit that only works with batteries.

Identify the correct diagram of a parallel circuit containing a cell and two bulbs.

• A diagram showing a cell connected in parallel to two bulbs.

• A diagram showing a cell connected in series to two bulbs.

• A diagram showing two cells connected in parallel to one bulb.

• A diagram showing a cell connected to a single bulb.

What can you say about the current anywhere in a series circuit?

• It stays the same

• It increases at each resistor

• It decreases at each resistor

• It reverses direction at each resistor