What is the equivalent resistance of this circuit? What is the current running through the first...
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Transcript of What is the equivalent resistance of this circuit? What is the current running through the first...
What is the equivalent resistance of this circuit? What is the current running through the first resistor?
What is the potential difference drop across the last resistor?
PARALLEL CIRCUITS
More than one current path
PARALLEL CIRCUIT
Potential difference is constant
V = V1 =V2 = V3 = … = Vn
PARALLEL CIRCUIT
Current through the entire circuit is equal to the sum of the currents through all the resistances
I = I1 + I2 + I3 + … + In
PARALLEL CIRCUIT
Ohm’s law holds true for each resistor
Vn = InRn
PARALLEL CIRCUITReq is less than any single resistance in the circuit
If more resistance is added, Req decreases and total current increases because there is another independent path in which charges can flow
What is Req of the circuit to the right? 2Ω
3Ω
4Ω
If there is a voltage source of 10 V attached, what is the total current through the circuit?
2Ω
3Ω
4Ω
If there is a voltage source of 10 V attached, what is the current traveling through each resistor?
2Ω
3Ω
4Ω
• What is the voltage across each bulb?• What is the current in each branch? • What is Req?• What is the total current provided by the
battery?
• What is the voltage across each resistor?• What is the current in each branch? • What is Req?• What is the total current provided by the
battery?
EXIT QUIZ
1. What is the equivalent resistance of this circuit?
2. What is the voltage across the 4Ω resistor? 3. What is the current through the 4Ω resistor? 4. What is the total current through the circuit?
4 Ω2 Ω2 Ω12 V