A galvanometer with a coil resistance of 40.0 W deflects full scale for a current of 2.0 mA. What series resistance should be used with this galvanometer in order to construct a voltmeter that deflects full scale for 50 V?
27 k Ohms.
29 k Ohms.
25 k Ohms.
31 k Ohms.
What current flows in the 12 ohms resistor in the circuit below:
1.0 A.
0.50 A.
0.25 A.
0.75 A.
What is the total resistance of the circuit in the figure below?
55 ohms.
35 ohms.
80 ohms.
50 ohms.
A p.d. of 12 V is connected between P and Q. What is the p.d. between X and Y?
6 V.
8 V.
0 V.
4 V.
