A light bulb is connected to a battery, as follows: A light bulb is connected to

Question

A light bulb is connected to a battery, as follows:

A light bulb is connected to a battery as follows: Another identical light bulb is then added to the circuit, and the circuit now looks as follows: Does adding bulb 1 produce an increase, decrease or no change in the current flowing through the A? Increase Decrease No Change Does adding bulb 1 produce an increase, decrease or no change in the current flowing through the point B? Increase Decrease No Change Which, if any, is greater, the current in bulb 1 or the current in the bulb 2? Bulb 1 Bulb 2 The current is the same in both

Explanation / Answer

Suppose resistance of bulb = R

Current = V/R

When added in parallel

Equivalent resistance = R/2

So

Current (I) = V/(R/2) = 2 V/R

a) Current increases through A

b)Current through 1 branch = V/R

so current remains same no change

c) Current is same in both

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