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SingaporeCombined ScienceQuick questions
Physics: Waves, Electricity and Magnetism
Quick questions on Current electricity explained: O-Level Combined Science
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is ohm's law?Show answer
For a metal conductor at constant temperature, the current is proportional to the voltage:
What are series circuits?Show answer
In a series circuit the components are in one loop:
What are parallel circuits?Show answer
In a parallel circuit components are on separate branches:
What is q1?Show answer
Define electric current and give its unit. [2 marks]
What is q2?Show answer
A supply drives a current of through a resistor. Find its resistance. [2 marks]
What is q3?Show answer
Explain why the total resistance falls when a second resistor is added in parallel. [2 marks]
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