# A cell of e.m.f. 1.5v is connected in series with a resistor of 3$$\Omega$$....

Question 620
A
5.0$$\Omega$$
B
4.5$$\Omega$$
C
2.4$$\Omega$$
D
2.0$$\Omega$$
E
1.8$$\Omega$$
##### Explanation
I = $$\frac{V}{R} = \frac{0.9}{3} = 3$$

r = $$\frac{E}{I} = \frac{1.5}{0.3} = 5$$

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