Question

Select the only incorrect statement from the following:

a. When resistors are connected in parallel, the voltage across each resistor is the same
b. When resistors are connected in series, the potential difference across each resistor is the same
c. When resistors are connected in parallel, the total current from the voltage source is the sum of the currents in the individual resistors
d. The current flowing in all resistors in series across a battery is the same as the current from the battery
e. The voltage across all the resistors in series is the sum of the individual voltages across each resistor

Answer 1

Answer: b. When resistors are connected in series, the potential difference across each resistor is the same.

Step-by-step explanation: When resistors are in series, current is the same in all of rhe them. According to the First Law of Ohm,

voltage (potential difference) = resistance * current.

Resistance is the proportionality constant between voltage and current.

If current is the same, to "keep" resistance constant, voltage has to vary.

So, when resistors are in series, current is the same and potential difference or voltage varies.