JUST ANSWER THE TWO QUESTIONS AND PROVIDE AND EXPLANATION - THANKS Two resistors

Question

JUST ANSWER THE TWO QUESTIONS AND PROVIDE AND EXPLANATION - THANKS

Two resistors, R1 and R2, arc connected in parallel and the combination is connected in series with resistor R3. If R, = R2 = R3 and a potential difference is applied to this circuit, the power dissipated is (a) greatest R,. (b) greatest in R2. (c) greatest in R3. (d) The same in all three resistors. Consider the circuit given in above MCQ. If R2 = 2R R3 = 3R,, and the current in R, resistor is I,, the current in R3 must be: (a) I1, (b) 2I1. (c) 3I1. (d) 1.5 I1, (c) 0.66 I1, (f) other. For the circuit given in the board, which of the following equation is correct? (a) 4I1, + 2I5 + 6I3 = 10. (b) 3I4 + 2I5 - 5I6 = 12.

Explanation / Answer

1) will be greatest in r3 because power dissipated p = IR . Since resistance is equal same current flows through r1 and r2 which adds up and flows through r3.so i3 = i1 + i2

2)0.66I1 since current flows inverse to the resistors.s0 i1r1 = i2r2. which gives i2 = i1/2 and i3r3 = i1r1 + i2r2

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