Nt1310 Unit 5

51. --------- extends the range of a moving-iron ac ammeter. C
a. A shunt
b. A multiplier
c. Changing number of turns of operating coil
d. A series

52. The most sensitive instrument is D
a. Moving-iron
b. Dynamometer
c. Hot-wire
d. Permanent-magnet moving coil

BRIDGE MEASUREMENT

53. The bridge uses the -------- measurement and operates on ------------- principle. C
a. Direct measurement and null indication
b. indirect Direct measurement and null indication
c. Comparison measurement and null indication
d. None of the above

54. A Wheatstone bridge is balanced if B
a. the ratio of resistors on one side of the bridge is one while the ratio of resistors on the other side is infinity
b. the ratio of resistors on one side of the bridge