Physics · Current Electricity
A battery with electromotive force E and internal resistance r is connected in series with a fixed resistor R and a variable resistor R'. The resistance R' can be varied from a non-zero value R0 to infinity. Given that r << R < R0, which of the following statements is/are correct? (a) The potential drop across the fixed resistor R remains nearly constant with variation in R'. (b) The current through R' is nearly constant as R' is varied. (c) The maximum current I through the circuit satisfies I ≤ Er + R.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(a) and (b) only
- 2(b) and (c) only
- 3(a) and (c) only✓
- 4(a) only
Correct answer
(a) and (c) only
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