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10 resistors, each of resistance R are connected in series to a battery of emf E and negligible internal resistance. Then those are connected in parallel to the same battery, the current is increased n times. The value of n is

Asked in NEET 2023 · Series and parallel combinations

• (1) 10
• (2) 100
• (3) 1
• (4) 1000

Step-by-step solution

Why the other options are wrong

• (1) Divides by 10 only once: the resistance falls from 10R to R/(10), a factor of 100, not 10.
• (3) The current cannot stay the same: the parallel combination has a much smaller resistance.
• (4) No single slip gives 1000; it would need the resistance to fall from 10R to R/(100).

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