Answer:
[tex]I = 45mA[/tex]
Explanation:
Given
[tex]I = 90mA[/tex] --- Current
Required
Determine the new current when resistance is doubled
Using [tex]V = IR[/tex]
Initially, we have:
[tex]V = 90mA * R[/tex]
When resistance is doubled and voltage remains unaltered, we have:
[tex]V = I* 2R[/tex]
2R represents the new resistance and I represents the new current
Equate both values of V
[tex]90mA * R = I* 2R[/tex]
Make I the subject
[tex]I = \frac{90mA * R}{2R}[/tex]
[tex]I = \frac{90mA }{2}[/tex]
[tex]I = 45mA[/tex]
The new current is 45milliAmps