38 A power supply and a solar cell are compared using the potentiometer circuit shown. power supply 2.000 V R 40.0 cm galvanometer solar cell The potentiometer wire PQ is 100.0 cm long and has a resistance of 5.00 2. The power supply has an e.m.f. of 2.000 V and the solar cell has an e.m.f. of 5.00 mV. Which resistance R must be used so that the galvanometer reads zero when PS = 40.0 cm? 3952 4052 C 7952 8052
38 A power supply and a solar cell are compared using the potentiometer circuit shown. power supply 2.000 V R 40.0 cm galvanometer solar cell The potentiometer wire PQ is 100.0 cm long and has a resistance of 5.00 2. The power supply has an e.m.f. of 2.000 V and the solar cell has an e.m.f. of 5.00 mV. Which resistance R must be used so that the galvanometer reads zero when PS = 40.0 cm? 3952 4052 C 7952 8052
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38 A power supply and a solar cell are compared using the potentiometer circuit shown.
power supply
2.000 V
R
S
40.0 cm
galvanometer
solar cell
The potentiometer wire PQ is 100.0 cm long and has a resistance of 5.00Q. The power supply
has an e.m.f. of 2.000 V and the solar cell has an e.m.f. of 5.00 mV.
Which resistance R must be used so that the galvanometer reads zero when PS = 40.0 cm?
A
3952
4052
C
7950
805 2
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