40V is needed to push 2 amperes of current through 20 ohms of resistance.
what is ohm's law?
It states that the current through a conductor between two points is directly proportional to the voltage across the two points.
V=I×R
Current equals Voltage divided by Resistance (I=V/R), Resistance equals Voltage divided by Current (R=V/I), and Voltage equals Current times Resistance (V=IR).
Given:
R=20Ω
I= 2amp
we know that,
V=I×R
V=2×20
V=40V
Thus,the voltage comes out to be 40V.
learn more about ohm's law from here: https://brainly.com/question/28238592
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