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Question 15

From Physics HL Paper 1A (May 2025, TZ1)

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  1. A continuous belt of width 0.60 m0.60\text{ m} travels at a constant speed of 2.5 m s−12.5\text{ m s}^{-1}. The belt has a uniform distribution of charge of 5.0 mC m−25.0\text{ mC m}^{-2} on its surface.
    As the belt passes a point all the charge is removed and is carried as a current in a wire.
Diagram showing a conveyor belt with dimensions and speed, and a wire collecting charge.
Diagram showing a conveyor belt with dimensions and speed, and a wire collecting charge.

What is the current in the wire?

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