An ammeter reads upto 1A. Its internal resistance is 0.81
. To increase the range to 10A the value of the required shunt is
a)
0.03
b)
0.3
c)
0.9
d)
0.09
An ammeter reads upto 1A. Its internal resistance is 0.81 . To increase the range to 10A the value of the required shunt is
a)
0.03
b)
0.3
c)
0.9
d)
0.09
Question ID - 151377 | SaraNextGen Top Answer
An ammeter reads upto 1A. Its internal resistance is 0.81 . To increase the range to 10A the value of the required shunt is
a)
0.03
b)
0.3
c)
0.9
d)
0.09
|
An ammeter reads upto 1A. Its internal resistance is 0.81 |
|||||||
|
a) |
0.03 |
b) |
0.3 |
c) |
0.9 |
d) |
0.09 |
1 Answer
127 votes
Answer Key / Explanation : (d) -
(d)
To increase the range of ammeter we have to connect a small resistance in parallel
.png)
(shunt), let its value be R.
Apply KCL at junction to divide the current.
.png)
Voltage across R= Voltage across ammeter
127 votes
Answer Link
127