Question

In a circuit below calculate (1) calculate total effective resistance (2) the total current through the circuit (3) potential different across 4 ohm and 2 ohm

Answer 1

Answer:

1) total resistance:-

4 ohm and 2 ohm are in series combination

so, R = 4+2

R = 6 ohms

Let this resistance be r¹

now, r¹ and 6 ohms are in parallel combination

so, 1/R = 1/6 + 1/6

1/R = 2/6

1/R = 1/3

R = 3 ohms

Let this resistance be r²

Total resistance = r¹ + r²

= 6+3

= 9 ohms

2) total current:-

current = potential difference/resistance

current = 6V/9ohms

= 0.6 ampere

3) potential difference:-

potential difference = current × resistance [ by ohm's law]

current for 4 ohm and 2 ohm = 1 ampere

because, 6 volts ÷ 6 ohms = 1 amp.

v = 1 ampere × 6 ohms

v = 6 volts

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