AP EAMCET · PHYSICS · Current Electricity
A galvanometer may be converted into ammeter or a voltmeter. In which of the following cases the resistance of the devices, so obtained will be largest?
- A Ammeter of range \(1 \mathrm{~A}\)
- B Ammeter of range \(10 \mathrm{~A}\)
- C Voltmeter of range \(1 \mathrm{~V}\)
- D Voltmeter of range \(10 \mathrm{~V}\)
Answer & Solution
Correct Answer
(D) Voltmeter of range \(10 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
We know that, to convert a galvanometer in ammeter, a very small resistance is connected in parallel, so that equivalent resistance becomes small. Whereas, to convert a galvanometer into voltmeter of greater range, a high resistance is connected in series. \(\therefore\) To get…
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