A p.d. of 12 V is connected between P and Q. What is the p.d. between X and Y?
4 V.
8 V.
0 V.
6 V.
A galvanometer has a coil with a resistance of 24.0 Ohms. A current of 180 mA causes full-scale deflection. If the galvanometer is to be used to construct an ammeter that deflects full scale for 10.0 A, what shunt resistor is required?
342 µ Ohms.
234 µ Ohms.
423 µ Ohms.
432 µ Ohms.
Determine the current in the 7 ohms resistor in in the figure below:
1.6 A.
1.3 A.
0.28 A.
2.1 A.
The diagram shows an arrangement of resistors. What is the total electrical resistance between X and Y?
Less than 1 ohm.
40 ohms.
7.5 ohms.
Between 10 ohms and 30 ohms.
What current flows in the 12 ohms resistor in the circuit below:
0.75 A.
0.50 A.
1.0 A.
0.25 A.
