A student builds a circuit in which a single junction splits the current from the…
PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity
Problem
A student builds a circuit in which a single junction splits the current from the battery into two separate branches. The student wants to test whether the junction obeys a conservation principle. Which measurement plan would provide the most direct evidence?
(a) Measure the voltage before and after the junction, confirming that the potential difference is the same in both branches.
(b) Determine the resistance of each branch with an ohmmeter and use Ohm's law to calculate whether the currents add to the source current.
(c) Measure the current in the conductor entering the junction and the currents in each of the two conductors leaving the junction.
(d) Measure the power dissipated in all resistors and compare it to the power delivered by the battery during the same interval.