Which resistors in the circuit must have the same amount of energy per unit charge across them?
2 answers:
<span>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: </span>
<span>, where q is the charge and V is the voltage; by rearranging the equation, we have </span>
<span>, 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.</span>
Answer:
D. B and C
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.
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
You might be interested in
Answer:
vi = 2.83 √gR
Explanation:
For this exercise we can use the law of conservation of energy
Let's take a reference system that is at point A, the lowest
Starting point. Lower, point A
Em₀ = Ki = ½ m vi²
Final point. Higher, point B
= K + U
It indicates that at this point the kinetic energy is ki / 2 and the potential energy is ki / 2
K = ki / 2
U = m g (2R)
Energy is conserved so
Em₀ = Em_{f}
½ m vi² = ½ (1/2 m vi²) + m g 2R
½ m vi² (1- ½) = m g 2R
vi² = 4 g 2 R
vi = √ 8gR = 2 √2gR
vi = 2.83 √gR