Question

Four resistors of 20 Ω, 40 Ω, 60 Ω, and 80 Ω are connected across a DC voltage source. If the current through this circuit is 0.5 A, what is the voltage applied to this circuit

the answer is 100 V but how?

Answer 1

Step-by-step explanation:

IF they are wired in SERIES, the total resistance is ( 20+40+60+80) = 200Ω

V = I R

V = .5 A * 200 Ω = 100 V

Answer 2

Answer: the voltage applied to this circuit is 100 volts

using Ohm's Law, which states that voltage (V) is equal to the product of current (I) and resistance (R):

V = I * R

Step-by-step explanation:

In this case, the total resistance of the circuit is the sum of the individual resistances:

R_total = 20 Ω + 40 Ω + 60 Ω + 80 Ω

R_total = 200 Ω

Given that the current through the circuit is 0.5 A, we can substitute the values into Ohm's Law:

V = 0.5 A * 200 Ω

V = 100 V

Therefore, the voltage applied to this circuit is 100 volts.