P 3.3-2 Consider the circuits shown in Figure P 3.3-2.

(a) Determine the value of the resistance R in Figure P 3.3-2b that makes the circuit in Figure P 3.3-2b equivalent to the circuit in Figure P 3.3-2a.

(b) Determine the current i in Figure P 3.3-2b. Because the circuits are equivalent, the current i in Figure P 3.3-2a is equal to the current i in Figure P 3.3-2b.

(c) Determine the power supplied by the voltage source.

Figure P 3.3-2.

Since these resistors are in series, the total resistance is found from

Current is constant in a series circuit, so we can use Ohm’s Law to find current

Power is found from

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This page last updated on January 17, 2019