What is the ratio of galvanometer current to maximum range

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Reference no: EM13268597

1. A meter being used for a 2-wire resistance measurement has an internal current source of 1 mA. If the meter's test leads have equal resistances of 0.06-ohm, what is the measured resistance for:

a. A resistor of actual value 0.5-ohm?

b. A resistor of actual value 1K-ohm?

2. Refer to the Wheatstone Bridge diagram attached. If the galvanometer indicates zero when R1=110-ohm, R2=10-ohm, and R3 is set at 2.97K-ohm, what is the value of Runknown?

3. Refer to the Wheatstone Bridge diagram. If R1=1-ohm, R2=111-ohm, Runknown= 1?, R3 is set at 1K-ohm, and the battery is 9V:

a. What is the current flowing through the galvanometer? Use 60? for the internal galvanometer resistance in calculations.

b. The measurement range of the galvanometer is +/- 500µA. What is the ratio of galvanometer current to its maximum range of 500µA?

c. Is there danger of damage to the galvanometer with these resistance values?

Reference no: EM13268597

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