NEET-XII-Physics
qstns with ansrs year:2022
- #15Two resistors of resistance, `` 100 \,\Omega `` and `` 200 \,\Omega `` are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in `` 100\, \Omega `` to that in `` 200\, \Omega `` in a given time is :
(A) `` 4: 1 ``
(B) `` 1: 2 ``
(C) `` 2: 1 ``
(D) `` 1: 4 ``digAnsr: CAns :
As both resistors are in parallel combination so potential drop `` ( V ) `` across both are same.
`` P =\frac{ V ^{2}}{ R } \Rightarrow P \propto \frac{1}{ R } ``
`` \frac{ P _{1}}{ P _{2}}=\frac{ R _{2}}{ R _{1}}=\frac{200}{100}=\frac{2}{1} ``
`` =2: 1 ``