Question

Equivalent resistance of two resistors connected in parallel. (a) find the total resistance of the circuit
(b)Current show by ammeter.​

Answer 1

Explanation:

(i) Equivalent Resistance formula in parallel combination are :

$\frac{1}{r} = \frac{1}{r1} + \frac{1}{r2}$

so, $\frac{1}{r} = \frac{1}{10} + \frac{1}{15} = \frac{3 + 2}{30} = \frac{5}{30}$

so, $r = \frac{30}{5} = 6$

for (ii) as we know

From Ohm's Law i.e. V= IR

here V= 4Volts Req= 6 ohm

so $= \frac{4}{6} = 0.66amp$

so, current shows is 0.66 A

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