Checkpoint: loops, switches, parts and safety

A loop has a cell, a lamp and a closed switch. What makes the lamp glow?

• The switch makes the electricity for the lamp
• The lamp stores the current for later
• The cell pushes current round the loop

A coin is put in the gap of a loop. What happens to the lamp?

• It glows, because metal is a conductor
• It glows dimly
• It stays dark, because metal is an insulator

In a cell symbol, the long line is which end?

• The positive end
• The switch end
• The negative end

Two cells are in a torch. One is turned round. What does the lamp do?

• It stays dark, as the pushes cancel
• It glows more brightly, as both cells push
• It glows once and then stops

Which plan is safe for an experiment with electricity?

• A torch cell, a lamp and wet hands
• A wall socket, a long wire and a fan
• A torch cell and a lamp, with an adult