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Class 12 › Physics › Current Electricity
CBSE2017Class Class 12 · Physics1 Marks · Mcq✅ Verified
Beams of electrons and protons move parallel to each other in the same direction. They
A. attract each other
B. repel each other
C. neither attract nor repel
D. force depends upon speed of beams
✅ Answer & Solution
✅ Correct Answer: B
Electrons moving in one direction produce conventional current $I$ in the opposite direction. Protons moving in the same direction produce conventional current in that direction. So the two conventional currents are in opposite directions — parallel conductors with opposite currents repel each other (by Ampere's law).
