Question 1.15: A current of 100 mA flows in a 56 Ω resistor. What voltage d...
A current of 100 mA flows in a 56 Ω resistor. What voltage drop (potential difference) will be developed across the resistor?
Here we must use V = I × R and ensure that we work in units of volts (V), amperes (A) and ohms (Ω).
V = I × R = 0.1 A × 56 Ω = 5.6 V(Note that 100 mA is the same as 0.1 A.)
This calculation shows that a p.d. of 5.6 V will be developed across the resistor.
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