Look at the circuit given in figure 1. What is the current in the circuit? What

Question

Look at the circuit given in figure 1. What is the current in the circuit? What is the terminal voltage from a to b? What is the terminal voltage from c to d? What is the voltage from a to d? What is the electric potential (voltage) at point a?

Explanation / Answer

a) total voltage of the circuit + 20 - 10 = 10v current = 10/(5+1+3 +1) = 1 A direction of the current is from top battery going towards a -> c -> d -> b. b) voltage across 1 ohm resistor = 1A * 1R = 1V voltage from a to b = -1 + 20 = 19 V c) voltage across 1 ohm resistor = 1A * 1R = 1V voltage from c to d = -1 + 10 = 9V d) voltage across 5 ohm resistor = 1A * 5R = 5V voltage from a to d = -5 -1 + 9 = 4V e) total voltage = 10 V from top battery. at point a = 10 -1 = 9 V

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