An ammeter of resistance 5Ω has a full-scale deflection when a current of 50 mA flows in it. The value of the resistor required to adapt it to measure a current of 5 A is?
a
0.25Ω
b
5.00Ω
c
19.80Ω
d
0.05Ω
Explanation
Correct Option
dVideo Explanation
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Gihjk268Gusvk
2 years ago
guys ive understood
R=rI/i-I where r is the resistance, I is the current in mA which will be divided by 1000 to be converted to Amps and i is current measured in Amps so 50Ma is 0.05 when converted to Amps
R= 5x0.05/5-0.05
R=0.25/4.95
R=0.0505050
R=0.05






