A circuit consists of 5 resistors and 3 batteries (see diagram); the connecting wires have all a negligible resistance. The values for R1 , R2 , R3 , R4 , and R5 are 14 Ω, 41 Ω, 68 Ω, 83 Ω, and 110 Ωrespectively. The batteries have a negligible internal resistance; their voltages , V1 , V2 and V3 , are 12 V, 23 V and 50 V, respectively (for their polarities, see the diagram).
(a)
Is the current I1 flowing in the direction shown? Choose which direction I1 is really flowing below:
What is it magnitude in Amperes?
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Is the current I2 flowing in the direction shown? Choose which direction I2 is really flowing below:
What is it magnitude in Amperes?
unanswered
Is the current I4 flowing in the direction shown? Choose which direction I4 is really flowing below:
What is it magnitude in Amperes?
unanswered
(b)
What is the potential difference (pay attention to the sign!) in Volts between the points A&P : VA-VP ?
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What is the potential difference (pay attention to the sign!) in Volts between the points P&N : VP-VN ?
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What is the potential difference (pay attention to the sign!) in Volts between the points G&D : VG-VD ?
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