Five resistors are connected in a circuit, as shown above. resistor A = 3 ? resi

Question

Five resistors are connected in a circuit, as shown above.

resistor A = 3?

resistor B = 6?

resistor C = 4?

resistor D = 8?

resistor E = 8?

If the resistance of resistor C is increased, what happens to the current through the battery and the current through each resistor?Irepresents the current through the battery,Ia the current through resistor A, etc.

A. I and IA stay the same; Ic, Id, and Ie decrease; while Ib decreases.

B. All the currents stay the same except for Ic, which decreases.

C. I, Ia, and Ie stay the same; Ic and Id decrease; while Ib increases.

D. All the currents decrease except for Ib, which increases.

E. All the currents decrease.

F. I, Ia, and Ib stay the same; Ic and Id decrease; while Ie increases.

Explanation / Answer

Total effective resistance = 3 + 6 || (4 + 8) + 8 = 15 ohm

If Resistor C = 4 ohm is increased ,

obviously total current is effected (decrease )

But in Resistor b recieves more current since its parallel connection has more resistance

Therefore, OPTION D is correct

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