Question

Two resistors X and Y of resistances 2ohm and 3ohm respectively are first joined in parallel and then in series.in each case the voltage supplied is 5v
Calculate the voltage across 3ohm resistor in the series ocombination

Answer 1

Explanation:

w.k.t

v=i×r

5=i×3

i = 5/3

Answer 2

$V_2=2\Omega$

Explanation:

Given:

voltage supplied to the circuit, $V=5\ V$

resistances ,

                    $R_1=2\Omega\\R_2=3\Omega$

• When the resistances are connected in series then the voltage across the resistors are in the inverse ratio of their resistances.

Voltage in the 3 ohm resistor:

$V_2=V\times \frac{R_2}{R_1+R_3}$

$V_2=5\times \frac{2}{2+3}$

$V_2=2\Omega$

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TOPIC: voltage in series

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