A potentiometer is used to measure the emf of a cell. At null point, no current flows through_______
A. the main circuit
B. the cell circuit
C. both the main and cell circuits
D. the potentiometer wire
Answer:B
A potentiometer is used to measure the emf of a cell. At null point, no current flows through_______
A. the main circuit B. the cell circuit C. both the main and cell circuits D. the potentiometer wire