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Questions and Answers
What is the formula to calculate power in a DC circuit?
What is the formula to calculate power in a DC circuit?
- P = R x I^2
- P = V^2 / R
- P = I / V
- P = V x I (correct)
How many resistors are in the given DC circuit?
How many resistors are in the given DC circuit?
- Two
- Four (correct)
- Three
- One
What is the formula to calculate power dissipated by a resistor?
What is the formula to calculate power dissipated by a resistor?
- P = V x I
- P = V^2 / R
- P = R x I^2 (correct)
- P = I / V
How is the current flowing through each resistor calculated?
How is the current flowing through each resistor calculated?
What is the formula to calculate the power being supplied by the battery?
What is the formula to calculate the power being supplied by the battery?
What are the labeled currents flowing through different branches of the circuit?
What are the labeled currents flowing through different branches of the circuit?
What is the total power being dissipated by the four resistors?
What is the total power being dissipated by the four resistors?
How is the circuit simplified to calculate the current flowing through each resistor?
How is the circuit simplified to calculate the current flowing through each resistor?
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Study Notes
- The problem involves calculating the power being dissipated by a resistor in a DC circuit.
- The circuit has a 20-volt power supply and four resistors.
- Power can be calculated using the formula V x I, where V is the voltage and I is the current.
- For resistors, power can be calculated as R x I^2 or V^2 / R.
- To calculate the current flowing through each resistor, the circuit is simplified using an equivalent resistor.
- Currents flowing through different branches of the circuit are labeled as i1, i2, and i3.
- Currents are calculated using the junction rule and Ohm's law.
- Power being supplied by the battery is calculated as 20 x i1.
- Power being dissipated by each resistor is calculated as R x i^2.
- The total power being dissipated by the four resistors is equal to the power being supplied by the battery.
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