Question

Which resistors in the circuit must have the same amount of energy per unit charge across them?

A. C and D

B. A and B

C. A and D

D. B and C

Answer 1

D. B and C

Step-by-step explanation:

We have to find that which of the given is having same amount of energy per unit charge.

So we know that energy per unit charge is defined as potential.

`V = (U)/(q)`

so here we have to find in this circuit that which of the given resistors are at same potential.

So here we can see that resistance B and C are parallel to each other in this circuit and all the resistors which are in parallel to each other are always having same potential.

So B and C are having same potential energy per unit charge

Answer 2

The correct answer is D): resistors B and C. In fact, the energy per unit charge is equal to the voltage across the resistors. The electrical potential energy is in fact:
`U=qV`, where q is the charge and V is the voltage; by rearranging the equation, we have
`V= (U)/(q)`, therefore the voltage is the energy per unit charge. In the circuit in the figure, the resistors B and C are connected to the same points of the circuit (they are connected in parallel), therefore they have the same voltage, so they have the same energy per unit charge.