Electric Circuits - Bow Valley College

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+ V3 drops. Units V = A Volt = amp X ohm Ammeter - measures current in a circuit Voltmeter - measures the voltage drop across part of a circuit or an entire circuit Resistor Voltage source - direct current Battery cells in series Battery cells in parallel Transformer Switch open Switch closed Ground Series <strong>Circuits</strong>
Find: (a) total resistance (b) total current (c) Vdrop at R1, R2, R3, R4 (d) current at R3 (a) RT = R1 + R2 + R3 + R4 RT = 5.0 + 7.0 + 9.0 + 11 RT = 32 (b) VT = IRT 24V = I (32 ) I = 0.75A (c) Vdrop at R1 Vdrop= IR Vdrop = (0.75A) (5.0 ) Vdrop = 3.75V Vdrop at R3 Vdrop= IR Vdrop = (0.75A) (9.0 ) Vdrop = 6.75V CHECK: VT = Vl + V2 +V3 +V4 VT = 3.75V + 5.25V + 6.75V + 8.25V VT = 24V (d) I = 0.75A (Current is constant in a series circuit) V = IR VT= V1 = V2 = V3 1 = 1 + 1 + 1 RT R1 R2 Parallel <strong>Circuits</strong> Vdrop at R2 Vdrop= IR Vdrop = (0.75A) (7.0 ) Vdrop = 5.25V Vdrop at R4 Vdrop= IR Vdrop = (0.75A) (11 ) Vdrop = 8.25V Voltage across each resistor is the same in a parallel circuit.
Page 1: Electric Circuits Current - a flow
Page 5 and 6: (c) Vdrop (d) I1, I2, I3 (a) (b) V
Page 7 and 8: Question 3: Find: (a) (a) total res
Page 9 and 10: (a) 1 = 1 + 1 R 12.0 8.00 R = 4.80
Page 11 and 12: Question 3: Find (a) total resistan

Electric Circuits - Bow Valley College

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