A parallel circuit has a 179.7 V battery and 3 resistors, R1 = 68.6
Ω
, R2 = 123.6
Ω
, and R3 = 366.9
Ω
. How much power is develop in the circuit?

Question

A parallel circuit has a 179.7 V battery and 3 resistors, R1 = 68.6 
Ω
 , R2 = 123.6 
Ω
 , and R3 = 366.9 
Ω
 .  How much power is develop in the circuit?

BlackTom AI · Accepted Answer

We are given a parallel circuit with a supply voltage of 179.7 V and three resistors in parallel: R1 = 68.6 Ω, R2 = 123.6 Ω, and R3 = 366.9 Ω.

First, compute the equivalent resistance for resistors in parallel using 1/R_eq = 1/R1 + 1/R2 + 1/R3.
- 1/R1 = 1/68.6 ≈ 0.01458
- 1/R2 = 1/123.6 ≈ 0.008088
- 1/R3 = 1/366.9 ≈ 0.002724
Sum = 0.01458 + 0.008088 + 0.002724 ≈ 0.025392
Therefore, R_eq ≈ 1 / 0.025392 ≈ 39.38 Ω.

Next, use the power formula for a load with a given voltage: P = V^2 / R_eq.
- V^2 = (179.7)^2 ≈ (180 − 0.3)^2 = 32400 − 108 + 0.09 ≈ 32292.09
- P ≈ 32292.09 / 39.38 ≈ 820.0 W (approximately).

To verify consistency, note that lowering the equivalent resistance increases power for a fixed voltage, and the calculated R_eq around 39.38 Ω with V ≈ 180 V yields a power on the order of several hundred watts, specifically about 8.2×10^2 W.

Key checks:
- Correct parallel formula was used for R_eq.
- The arithmetic for each reciprocal and the final division aligns with typical unit analysis (voltage in volts, resistance in ohms, power in watts).
- Units: volts squared divided by ohms gives watts, which matches the desired quantity.

If you compare to common roundings, small differences in rounding intermediate steps (e.g., 0.01458 vs 0.0146) will only slightly shift the final result, keeping it near 820 W.

Physics 1 Hon - Bowles - p06/p07 P10.15 Lesson 4 - Exit Ticket

A parallel circuit has a 179.7 V battery and 3 resistors, R1 = 68.6 Ω , R2 = 123.6 Ω , and R3 = 366.9 Ω . How much power is develop in the circuit?

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Physics 1 Hon - Bowles - p06/p07 P10.15 Lesson 4 - Exit Ticket

A parallel circuit has a 179.7 V battery and 3 resistors, R1 = 68.6 Ω , R2 = 123.6 Ω , and R3 = 366.9 Ω . How much power is develop in the circuit?

查看解析

登录即可查看完整答案

类似问题

Which is correct concerning a parallel circuit?

Which is correct concerning a parallel circuit?

Which statement is correct when made in reference to a parallel circuit?

Which is correct in reference to electrical resistance?

The lamps in a string of decorative lights are connected in parallel across a constant-voltage power source. What happens if one lamp burns out? (Assume negligible resistance in the wires leading to the lamps.)

When unequal resistors are connected in parallel in a circuit,

In the circuit below, i = 4.0 Amps, R1 = 5.8Ω and R2 = 3.5Ω. Find Vs in Volts to 2dp.

I have a simple circuit running off a battery powering a lightbulb (bulb A). If I add another light (bulb B) parallel to bulb A I can expect that the voltage across bulb A will _________ and bulb A will shine___________.

更多留学生实用工具

希望你的学习变得更简单

I have a simple circuit running off a battery powering a lightbulb (bulb A). If I add another light (bulb B) parallel to bulb A I can expect that the voltage across bulb A will _ and bulb A will shine___.