When three 30
Ω
resistors are connected in parallel across a 9-volt source, the total current is

Question

When three 30 
Ω
resistors are connected in parallel across a 9-volt source, the total current is

BlackTom AI · Accepted Answer

When three 30 Ω resistors are connected in parallel across a 9 V source, the currents in the branches add up to give the total current.
Option A: 0.45 A. This would imply either each branch carries 0.15 A or an error in adding branch currents. Since each 30 Ω branch with 9 V across it draws I = V/R = 9/30 = 0.3 A, the total would be 3 × 0.3 A = 0.9 A, not 0.45 A.
Option B: 0.30 A. This value corresponds to the current through a single 30 Ω resistor at 9 V, not three parallel resistors. In parallel, currents sum, so the total must be larger than any one branch current.
Option C: 0.90 A. This matches the correct total current. Explanation: each branch draws I_branch = V/R = 9 V / 30 Ω = 0.3 A. With three identical resistors in parallel, total current I_total = 3 × 0.3 A = 0.9 A. Alternatively, the equivalent resistance of the three in parallel is R_eq = 30 Ω / 3 = 10 Ω, so I_total = V / R_eq = 9 V / 10 Ω = 0.9 A. This confirms 0.90 A as the total current.
Option D: 0.10 A. This is far too small for the configuration; it corresponds to perhaps misapplying Ohm’s law with a much larger resistance (e.g., thinking there is 90 Ω total or miscounting branches). The correct parallel combination yields a much smaller effective resistance and a correspondingly larger current than 0.10 A.

Physics 1 Hon - Bowles - p06/p07 P10.13/10.15 Electrostatics & Circuits MC Practice

When three 30 Ω resistors are connected in parallel across a 9-volt source, the total current is

View Explanation

Log in for full answers

Similar Questions

A 7.8 Ω resistor and a 13.3 Ω resistor are connected in parallel across a 17.9 V supply. Calculate the current in 7.8 Ω resistor.

If three resistors are all connected in parallel, find the total resistance in the circuit. R1 = 41Ω, R2 = 20Ω and R3 = 38Ω. Answer to 1 decimal place and only put in the numerical value. Do not write the unit in your answer.

The figure presents a parallel connection of two identical resistors. The equivalent overall resistance of the circuit is

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler