P5 Science · Chapter 10brightbit.net/worksheets
Electricity
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- 1.
What is an electric circuit?
(a) A source of electrical energy only(b) A complete, unbroken path through which electric current can flow(c) A broken path where electrons stop(d) Only the wires in an electrical system
- 2.
What is the difference between a series circuit and a parallel circuit?
(a) Series: one path for current; Parallel: multiple paths for current(b) Series: multiple paths; Parallel: one path(c) Both have the same number of paths(d) Series circuits cannot have switches
- 3.
In a series circuit with 3 bulbs, one bulb blows (breaks). What happens to the other bulbs?
(a) They burn brighter(b) They stay the same(c) They all go out(d) Only one goes out
- 4.
In a parallel circuit with 3 bulbs, one bulb blows. What happens to the other bulbs?
(a) They all go out(b) They continue to work normally(c) They burn less brightly(d) They also blow
- 5.
What happens to the brightness of bulbs when more bulbs are added in series?
(a) They get brighter(b) They stay the same(c) They get dimmer(d) They blow immediately
- 6.
State ONE advantage of connecting household appliances in parallel rather than in series.
- 7.
What is electrical resistance?
(a) The flow of electric current(b) The opposition to the flow of electric current(c) The force that pushes charges around a circuit(d) The energy stored in a battery
- 8.
Why do wires in a circuit get warm when a large current flows through them?
- 9.
A battery, a bulb, and a switch are connected in series. The switch is open. Is the bulb on or off? Explain.
- 10.
What is the function of a fuse in an electrical circuit?
(a) To increase current flow(b) To store electrical energy(c) To protect the circuit by melting and breaking the circuit if the current is too high(d) To convert electrical energy to light
Answer key — P5 Science: Electricity
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- 1.(b) A complete, unbroken path through which electric current can flow
- 2.(a) Series: one path for current; Parallel: multiple paths for current
- 3.(c) They all go out
- 4.(b) They continue to work normally
- 5.(c) They get dimmer
- 6.Each appliance can be switched on/off independently, and if one fails the others still work
- 7.(b) The opposition to the flow of electric current
- 8.Electrical energy is converted to heat energy due to resistance in the wire; larger currents produce more heat
- 9.Off; an open switch creates a gap in the circuit, breaking the path so no current flows and the bulb does not light up
- 10.(c) To protect the circuit by melting and breaking the circuit if the current is too high
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