The potential difference across a resistor is 20 Volt, when measured by a voltmeter and the current flowing through the resistor is 40 ampere. What is the value of that resistance ?
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Answer:
Situation : 1
V1=30V,I1=3AV1=30V,I1=3A
R=303=10Ω(∵R=VI)R=303=10Ω(∵R=VI)
Situation : 2
V2=20V,I2=?V2=20V,I2=?
R=10Ω (∵The resistor is same)R=10Ω (∵The resistor is same)
I2=V2R=2010=2amperes.
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