SECTION -B Two bulbs are rated (P_1, V) and (P_2, V). If they are connected (i) in series and (ii) in parallel across a supply V, find the power dissipated in the two combinations in terms of P_1 and P

CBSE Class 12 Physics 2019 Delhi Set 1 Paper

Question : 6

Total: 27

SECTION -B

Two bulbs are rated (P1,V) and (P2,V). If they are connected (i) in series and (ii) in parallel across a supply V, find the power dissipated in the two combinations in terms of P1 and P2.

Solution:

Calculation of Power dissipation in two combinations
R1‌=‌

,R2=‌

,
Ps‌=‌

=‌

P1P2

P1+P2

‌

‌=‌

+‌

‌

‌=‌

+‌

=‌

P1+P2

∴Pp‌=‌

=P1+P2

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