An ammeter (instrument that measures current) carries 0.05 A and is in parallel with a shunt resistor drawing 1.9 A. If the voltage across the combination is 4.2 V, find (a) the total current, (b) resistance of the shunt, (c) resistance of the ammeter, and (d) total resistance. = 1.9 A 4 = 0.05 A %3! V = 4.2 V Shunt resistor Ammeter resistance

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Question 4
An ammeter (instrument that measures current) carries 0.05 A and is in parallel with a shunt
resistor drawing 1.9 A. If the voltage across the combination is 4.2 V, find (a) the total current,
(b) resistance of the shunt, (c) resistance of the ammeter, and (d) total resistance.
= 1.9 A
|4 = 0.05 A
V = 4.2 V
Shunt
resistor
Ammeter
resistance
Ans.
(a) Ir = 1.95 A; (b) Shunt R = 2.21 2; (c) Ammeter R = 84.0 52: (d) RT = 2,15 2
Transcribed Image Text:Question 4 An ammeter (instrument that measures current) carries 0.05 A and is in parallel with a shunt resistor drawing 1.9 A. If the voltage across the combination is 4.2 V, find (a) the total current, (b) resistance of the shunt, (c) resistance of the ammeter, and (d) total resistance. = 1.9 A |4 = 0.05 A V = 4.2 V Shunt resistor Ammeter resistance Ans. (a) Ir = 1.95 A; (b) Shunt R = 2.21 2; (c) Ammeter R = 84.0 52: (d) RT = 2,15 2
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