Questions
In a region of space, O a uniform electric field exists. If the potential at the origin is 10 V, what is the potential at the point ?
detailed solution
Correct option is A
If O be the origin, then r→AO=r→A−r→O=(2i^+j^)mNow, VA−VO=−E→.r→AO⇒VA−10=−(3i^+4j^).(2i^+j^)V=−10⇒VA=0Talk to our academic expert!
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A resistor R is connected across a battery of emf 12 V. It observed that terminal potential differenceis 9 V and the power delivered to resistor is 18 W. Internal resistance of the battery ‘r’ and the resistance R are respectively
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