ELECTRIC CHARGE
2 marks · EasyA student rubs a plastic strip with a wool cloth and finds that the strip is now positively charged.
Explain how the strip became positively charged.
State what happens to the charge on the wool cloth.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) Electrons moved from the strip to the cloth.
(b) The cloth became negatively charged.
Show mark scheme and worked solution
Marking points
M1 (a) · 1 mark · States electrons moved from strip to cloth (or lost electrons).
A1 (b) · 1 mark · States the cloth became negatively charged.
Worked solution
a) Electrons transferred from the plastic strip to the wool cloth, leaving the strip with a positive charge. b) The wool cloth gained electrons and became negatively charged.