Home Physics Current Electricity Combination of Resistance Three bulbs, each having a resistance of 180…
Physics Current Electricity Combination of Resistance MCQ (Single Correct)

Three bulbs, each having a resistance of 180 Ω Ω are connected in parallel to an ideal battery of emf 60 V. Find the current delivered by the battery when

A
all the bulbs are switched on,
B
two of the bulbs are switched on and
C
only one bulb is switched on.

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Text Solution

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The correct answer is:
CHECK THE SOLUTION.

[ 1 A, 2/3 A, 1/3 A]

Sol. case R eq = = 60 Ω Ω

i = = 1 amp

case R eq = = 90 Ω Ω

i = = amp

case R eq = 180 Ω Ω

i = amp

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