A galvanometer can be converted into a voltmeter by connecting it with which of these?

Correct option is C

The correct answer is (c) high resistance wire in series

Explanation:
• To convert a galvanometer into a voltmeter, a high resistance (called a multiplier) is connected in series with it.
• This ensures that the voltmeter has high resistance and draws negligible current from the circuit.
• The value of resistance R is given by $R = \frac{V}{I_g} - G$.

Information Booster:
• To convert a galvanometer into an ammeter, a low resistance (shunt) is connected in parallel.
• An ideal voltmeter has infinite resistance.

Additional Knowledge:
low resistance in parallel (Option b)
• This is the method to create an ammeter.
high resistance in parallel (Option d)
• This would not effectively limit the current through the galvanometer for voltage measurement.
low resistance in series (Option a)
• This would likely result in the galvanometer burning out when measuring high voltages.

So the correct answer is (c)