Find I The ammeter in the figure(Eigure 1) reads 8.0 A Express your answer to tw

Question

Find I The ammeter in the figure(Eigure 1) reads 8.0 A Express your answer to two significant figures and include the appropriate units. alue Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining; no points deducted Use either an integer, decimal number, or scientific notation for the numeric portion of your answer. Do not use calculations or functic Part B Find I2 Express your answer to two significant figures and include the appropriate units. Figure 1 of 1 2-Value Units 3.0 4.5 Submit My Answers Give Up 2.0 Part C Find Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

Part A

Using kirchhoffs law in the left hand side loop

9 Volts = 3I1 + 2x8

Or

3I1 = 9 - 16 = -7

I1 = -7/3 = -2.33 A

Hence, current has magnitude 2.33 A and flows opposite to direction shown.

Part B

As kirchooffs current law, at joint

I1 + I2 = 8

I2 = 8 + 2.33 = 10.33 A

Hence, magnitude is 10.33 and current flows in direction shown

Part C

Using kirchhoffs voltage law in the right side loop

E = 4.5I2 + 2 x 8

E = 4.5 x 10.33 + 16 = 62.5 Volts

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