NEET-XII-Physics
32: Electric Current in Conductors
- #9Two resistances R and 2R are connected in parallel in an electric circuit. The thermal energy developed in R and 2R are in the ratio
(a) 1 : 2
(b) 2 : 1
(c) 1 : 4
(d) 4 : 1digAnsr: bAns : (b) 2 : 1
Thermal energy developed in the resistances,
H =`` \frac{{V}^{2}}{R}t``
Heat developed in the resistance R, H1=`` \frac{{V}^{2}}{R}t``
Heat developed in the resistance 2R, H2 = `` \frac{{V}^{2}}{2R}t``
Thus, Heat developed in the resistance R and 2R are in ratio 2:1.
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