MCQ
How many resistances are used in a Wheatstone bridge?
- A$3$
- ✓$4$
- C$5$
- D$6$
✓
Answer
Correct option: B.
$4$
Wheatstone bridge is an arrangement of four resistors $\text{P, Q, R,}$ and $S$, such that if we know the value of the resistances of any three of them, we can obtain the value of fourth unknown resistance. Therefore, there are $4$ resistances in a Wheatstone bridge.
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