Answer to Question #280707 in Electric Circuits for ali

Question

If you wish to increase the amount of current in a resistor from 100mA to 150mA by changing The 20V source, by how many volts should you changes the source? To what new value should You set it

Answer 1

Given:

$I_i= 100mA$ $I_f=150mA$ , $V_i= 20V$

Resistance $R=\frac{V}{I} =constant$

$\frac{V_i}{I_i} =\frac{V_f}{I_f}$

$\therefore \frac{20}{100} =\frac{V_f}{150}$ $V_f=30volts$

The new value should be set at 30 volts