Question 38
Current ElectricityThe circuit diagram above contains four ammeters W, X, Y and Z. Which of the following statements about the ammeter reading is correct?
- A.The reading of W is equal to that of Y and twice that of X
- B.The reading of Y is greater than that of Z.
- C.The readings of W and Y are equal and each is greater than that of X
- D.The reading of Z is equal to the sum of the readings of W and Y.
Show the answer and explanation
Answer: C (The readings of W and Y are equal and each is greater than that of X)
Explanation
W, Z and Y are all in the main line, so they carry the full current. X is in only one of the two parallel branches, so it carries less.