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Everyday Physics · Question 47 of 68

What does the ammeter in the circuit shown read?

Question 47

EasyOriginal question

What does the ammeter in the circuit shown read?

A 5 V battery connected across two resistors in parallel, R1 = 10 Ω and R2 = 10 Ω, with an ammeter A in the main wire back to the battery.
Options for question 47

Show the answer and explanation
CorrectNot quiteAnswer C

Correct answer: C

Explanation

  1. Two equal 10 Ω resistors in parallel make 10 ÷ 2 = 5 Ω.

  2. The ammeter is in the main line, so it reads 5 ÷ 5 = 1 A.

Worth noting

0.5 A is the current in one branch. 0.25 A treats the pair as 20 Ω in series.

Concept
Equal resistors in parallel
Typical time
35 s
Your time
—
The rule this testsElectricity and magnetism
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Ten questions from Everyday Physics, at your own pace.

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