# Question: A galvanometer has a coil resistance of 20 A current

A galvanometer has a coil resistance of 20-Ω. A current of 200μA deflects the needle through ten divisions at full scale. What resistance is needed to convert the galvanometer to a full-scale 10-V voltmeter?

## Answer to relevant Questions

An ammeter has a resistance of 1.0mΩ. Sketch the circuit diagram and find (a) The current in the ammeter and (b) The voltage drop across a 10-Ω resistor that is in series with a 6.0-V ideal battery when the ammeter is ...(a) In Exercise 48, suppose instead the case had been properly wired and grounded as shown in Figure 18.23. If the grounding wire had a total resistance of 0.10-Ω, what is the ratio of the current in you to the current in ...A battery has three cells connected in series, each with an internal resistance of 0.020-Ω and an emf of 1.50 V. This battery is connected to a 10.0-Ω resistor. (a) Determine the voltage across the resistor. (b) How ...Two resistors are connected in parallel, as are two 4.0-Ω resistors. These two combinations are then connected in series in a circuit with a 12-V battery. What is the current in each resistor and the voltage across each ...A circular coil of current-carrying wire has the normal to its area pointing upward. A second smaller concentric circular coil carries a current in the opposite direction. (a) Where, in the plane of these coils, could the ...Post your question