Light coming from a discharge tube filled with hydrogen falls on the c – McqOptions

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1.	Light coming from a discharge tube filled with hydrogen falls on the cathode of the photoelectric cell. The work function of the surface of cathode is 4eV. Which of the following values of the anode voltage (in volts) with respect to the cathode will likely to make the photo current zero?
A.	-4
B.	-6
C.	-8
D.	-10
Answer» E.

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