b) Consider the circuits shown in parts A and B in the picture. In part A, a lig

Question

b) Consider the circuits shown in parts A and B in the picture. In part A, a light bulb is plugged into a wall outlet that has a voltage of 120 volts. circuit and the bulb turns on. In part B, a second, identical light bulb is connecte parallel in the circuit. How does the total current in circuit B compare w circuit A? A current I passes through the d i th that in a) The current is the same, I, as in part A. ) The current is twice as much, 21, as in part A. c) The current in part B is zero amperes d) The current is one fourth as much, 0.251, as in part A. e) The current is one half as much, 0.51, as in part A.

Explanation / Answer

We know that in a circuit if two resistors are connected in parallel, then voltage drop across them is same, and if resitance is also same, then current will also be same, as

I=V/R

So in the first circuit, total current is I

While in the ciruit B total current will be

v/R+v/R

so, it will be 2I

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