Consider four circuits shown in the figure below. In which circuit power dissipated is greatest (Neglect the internal resistance of the power supply)
Consider four circuits shown in the figure below. In which circuit power dissipated is greatest (Neglect the internal resistance of the power supply)
- A
- B
- C
- D
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Which of the following is not equal to watt
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If a $2\, kW$ boiler is used everyday for $1$ hour, then electrical energy consumed by boiler in thirty days is .......... $uint$
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Power $P$ is to be delivered to a device via transmission cables having resistance ${R_C}$. If $V$ is the voltage across $R$ and $I$ the current through it, find the power wasted and how can it be reduced.
Power $P$ is to be delivered to a device via transmission cables having resistance ${R_C}$. If $V$ is the voltage across $R$ and $I$ the current through it, find the power wasted and how can it be reduced.
If voltage across a bulb rated $220$ $volt-$ $100$ $watt$ drops by $2.5\%$ of its rated value, the percentage of the rated value by which the power would decrease is ............... $\%$
If voltage across a bulb rated $220$ $volt-$ $100$ $watt$ drops by $2.5\%$ of its rated value, the percentage of the rated value by which the power would decrease is ............... $\%$
- [AIPMT 2012]
Two bulbs, one of $200 \,W$ and the other of $100 \,W$ are connected in series with a $100 \,V$ battery which has no internal resistance. Then,
Two bulbs, one of $200 \,W$ and the other of $100 \,W$ are connected in series with a $100 \,V$ battery which has no internal resistance. Then,
- [KVPY 2009]