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Quick questions on Electric fields: Coulomb's law, field strength and potential - OCR A-Level Physics A
4short 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 electric field strength?Show answer
A charge in a uniform field experiences a constant force , so it accelerates uniformly (like a projectile in gravity). This is how electron beams are deflected in old cathode-ray tubes and in mass spectrometers.
What is q1?Show answer
State Coulomb's law. [2 marks]
What is q2?Show answer
Parallel plates apart have a potential difference of . Find the field strength. [2 marks]
What is q3?Show answer
State one similarity and one difference between electric and gravitational fields. [2 marks]
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