Question

2 cells of emf 2v and 4 v and internal resistance 1 ohm and 2 ohm respectively are connencted in parallel so as to sent current in the same direction through an external resistance of 10 v find the potential difference across the 10v resistor.

Answer 1

Answer:

2.5 V

Explanation:

Equivalent internal resistance of parallel connection

Req= R1xR2/R1+R2

∴ Req = 1+2/1×2

= 3/2 Ω

Equivalent emf of cells in parallel connection E

E= (10/ 10 + 3/2) x 8/3

=2.5V

Answer 2

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