COMEDK · Physics · 19. Current Electricity
A voltmeter of resistance \(1000 \Omega .0 .5 \mathrm{~V} /\) div is to be converted into a voltmeter to make it to read \(=1 \mathrm{~V} / \mathrm{div}\). The value of high resistance to be connected in series with it is
- A \(4000 \Omega\)
- B \(1000 \Omega\)
- C \(6000 \Omega\)
- D \(5000 \Omega\)
Answer & Solution
Correct Answer
(B) \(1000 \Omega\)
Step-by-step Solution
Detailed explanation
The sensitivity of the voltmeter is given as \(S_1 = 0.5 \text{ V/div}\). The resistance of the voltmeter is \(R_V = 1000 \Omega\). The full scale deflection current \(I_g\) is given by \(I_g = \dfrac{V_{div}}{R_V} = \dfrac{0.5}{1000} = 5 \times 10^{-4} \text{ A}\). The new…
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