Home › CBSE Class 12 (Science) › Physics › Current Electricity › Which statement about Ohm's law is correct?
Which statement about Ohm's law is correct?
AIt holds for every material
BIt is a fundamental law of nature
CIt is obeyed only by insulators
DIt holds for many materials but not all
Answer & Solution
Correct answer: D. It holds for many materials but not all
Ohm's law is obeyed by many substances but fails for diodes and others, so it is not a fundamental law.
Related questions
Why is a Wheatstone bridge used with strain gauges?The electrical resistance of a strain gauge is proportional to which quantity?The ratio arms P and Q of a post office box contain which set of resistance values?A post office box is a practical form of which instrument?Which is NOT needed for potential to vary linearly along a potentiometer wire?On a potentiometer wire with steady current, potential difference is proportional to what?Potential gradient along a potentiometer wire is defined as the potential difference per wAn ideal voltmeter should have what value of resistance?