In the apparatus shown in figure Q4.1a, the value displayed by the ammeter is proportional to

A. The rate at which electrons emerge from the cathode.
B. The average kinetic energy of the ejected electrons.
C. The maximum kinetic energy of the ejected electrons.
D. Both A and C.


A. The rate at which electrons emerge from the cathode.

Physics & Space Science

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What will be an ideal response?

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