Question

A galvanometer has resistance \( G = 100 \, \Omega \) and shows full-scale deflection at \( I_q = 1 \, \text{mA} \). To convert it into a voltmeter of range 5 V, what resistance should be connected in series?

• A. 400 \( \Omega \)
• B. 4900 \( \Omega \)
• C. 490 \( \Omega \)
• D. 5000 \( \Omega \)

Hint:

Remember: To convert a galvanometer into a voltmeter, calculate the series resistance using the formula \( R_s = \frac{V}{I_q} - G \).