Question

40. When a resistance of 2 ohm is connected across the terminals of a
cell, the current is 0.5 A, but when the resistance across the cell is
5 ohm the current is 0.25 A. The é.m.f. of the cell is:
A.
B.
C.
D.
E.
2.0 volt
1.5 volt
1.0 volt
0.5 volt
7.0 volt

Answer 1

Answer:

1.5 volts

Explanation:

i = E / ( R+r )

i - current

E- emf of cell

R- resistance

r- resistance of cell

hope it helps....