First slide

Ohm's law

Question

If the ammeter in the given circuit reads 2 A,the resistance R is

Moderate

A

$1 Ω$
B

$2 Ω$
C

$3 Ω$
D

$4 Ω$

Solution

$i = \frac{V}{R} \Rightarrow 2 = \frac{6}{\frac{6 \times 3}{6 + 3}} = \frac{6}{2 + R} \Rightarrow R = 1 Ω$

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