# Parallel Circuits, Voltage, Current, Power

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## Calculate values in parallel circuit

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Created Date 04.03.20
Last Updated 04.03.20
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• The voltage across each branch in a parallel circuit is equal to the source voltage. If the source voltage is 9V, what is the voltage drop across the first load?
• Three branch circuits each have 12V dropped across them. What is the source voltage?
• Which is the correct formula for finding total voltage in a parallel circuit?
• Which is the formula for finding total current in a parallel circuit?
• Given that current drawn by loads in 3 branches of a parallel circuit are 2A, 6A and 5A. What is the total current in this circuit?
• A parallel circuit has 2 branches. The source supplies 15A of current. If one branch draws 9A, how much will the next branch draw?
• A parallel circuit has 3 branches. The current flowing through one branch is found from the equation I1 = IT - I2 - I3. If the total current is 12A, one branch draws 3A and the next branch draws 5A, how much current is drawn by the 3rd branch?
• What is wrong with the following calculation of currents flowing through 3 branches of parallel circuits? IT = I1 + I2 + I3, IT = 5A + 4A + 10A, IT = 20A
• What is wrong with the following calculation of currents flowing through 3 branches of parallel circuits? I1 = IT + I2 + I3, IT = 7A + 9A + 3A, IT = 19A
• What is wrong with the following calculation of currents flowing through 3 branches of parallel circuits? I1 = IT - I2 + I3, I1 = 25A - 10A - 3A, I1 = 12A
• Which is the correct formula for finding total power in a parallel circuit?
• A parallel circuit has 2 branches. The source supplies 40W of power. If load in one branch consumes 28W, how much power will the 2nd branch consume?
• A parallel circuit has 3 branches. The power consumed by loads in these branches are 12W, 16W and 20W. What is the total power supplied by the source? (assuming no power lost)
• What is wrong with the following calculation of power used by 3 branches of a parallel circuit? PT = P1 + P2, PT = 30W +12W + 20W, PT = 62W
• What is wrong with the following calculation of power consumption of 3 branches in a parallel circuit? P2 = PT - P1 - P3, P1 = 30W - 16W - 8W, P2 = 6W
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