Question

will the potential difference across 2ohm resistors be same as that across the parallel combination of 4ohm resistors.Give reason​

Answer 1

Potential difference is a function of the source.  A theoretical voltage source would not be affected by load impedance, as it has no internal resistance to cause voltage drop, and can supply infinite current. Such a thing does not exist, but can be usefully approximated in many cases.   Likewise an ideal current source would maintain constant current but need to be capable of infinite voltage.   Real supplies have internal resistance, and limits on voltage and current. This means that the load affects both.   However, your question as postulated swaps a single resistor for an equivalent parallel pair, so the answer is yes.   A shorter answer might have been “learn to apply Ohm’s Law or you will not understand any of the lessons to follow.”

Answer 2

Answer:

Yes. hope this answer helps.

Explanation:

reason-

Two 4 ohm resistors have the same resistance as one two ohm resistor. Anything in parallel will have the same (voltage) potential across it.