Two heaters A and B have power rating of 1 kW and 2 kW, respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is:
Electrical energy and power
Every question from past board papers on Electrical energy and power, newest paper first. Open any question for its full worked answer.
NEET UG 2024 question paper (official, booklet S6)
Full paper →NEET UG 2022 question paper (official, booklet R6)
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Two 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 :
NEET UG 2019 question paper (official, booklet P1)
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Six similar bulbs are connected as shown in the figure with a DC source of emf E, and zero internal resistance.
The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be :
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Which of the following acts as a circuit protection device ?
NEET UG 2016 Phase 1 question paper (official, booklet A)
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The charge flowing through a resistance R varies with time t as \(Q = at - bt^2\), where a and b are positive constants. The total heat produced in R is :
NEET UG 2016 Phase 2 question paper (official, booklet ZZ)
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A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. When a resistance \(R\) is connected in series, it works perfectly and the bulb consumes 500 W. The value of \(R\) is