Question

The drop in potential across a resistor in a circuit is 40 V. What is the currentflowing through the resistor if the resistance is 2.0 ohm? (use Ohmis law. V = IR)

a. 40 A
b. 60 A
c. 20 A
d. 80 A

Answer 1

According to Ohm's law, the current flowing through the resistor can be found using the equation V = IR. Plugging in the given values of voltage drop and resistance, we can calculate the current to be 20A.

Step-by-step explanation:

According to Ohm's law, the voltage drop, V, across a resistor when a current flows through it is calculated using the equation V = IR, where I equals the current in amps (A) and R is the resistance in ohms (2). In this case, the voltage drop is given as 40 V and the resistance is 2.0 ohm. Plugging in these values into Ohm's law, we can find the current flowing through the resistor:

1. V = I * R
2. 40 = I * 2.0
3. Solving for I, we have I = 40/2.0 = 20 A

Therefore, the current flowing through the resistor is 20 A, so the correct answer is c. 20 A.