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In the circuit shown, the cell of emf 6 V is ideal. The resistor in which the power dissipated is greatest is,

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Important Questions on Current Electricity

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity NEET>Chapter 3 - Current Electricity>TOPICWISE QUESTIONS>Q 83
An electric kettle has two heating coils. When one of the coils is connected to an AC source, the water in the kettle boils in 10 min. When the other coil is used, the water boils in 40 min. If both the coils are connected in parallel, the time taken by the same quantity of water to boil will be, 
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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity NEET>Chapter 3 - Current Electricity>TOPICWISE QUESTIONS>Q 84
Two 220 V, 100 W bulbs are connected first in series and then in parallel. Each time the combination is connected to a 220 V AC supply line. The power is drawn by the combination in each case, respectively, will be 
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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity NEET>Chapter 3 - Current Electricity>TOPICWISE QUESTIONS>Q 85
In India, electricity is supplied for domestic use at 220 V. It is supplied at 110 V in the USA. If the resistance of a 60 W bulb for use in India is R, the resistance of the bulb for use in the USA will be,
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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity NEET>Chapter 3 - Current Electricity>TOPICWISE QUESTIONS>Q 86
An electric heater of resistance 6 Ω is run for 10 min on a 120 V line. The energy liberated in this period of time is, 
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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity NEET>Chapter 3 - Current Electricity>TOPICWISE QUESTIONS>Q 87
One filament takes 10 min to heat a kettle and another takes 15 min. If connected in parallel, they combined take how many minutes to heat the same kettle.
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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity NEET>Chapter 3 - Current Electricity>TOPICWISE QUESTIONS>Q 88

A 100 W bulb, B1 and two 60 W bulbs, B2 and B3 are connected to a 250 V source as shown in the figure. Now W1, W2 and W3 are the output powers of the bulbs B1, B2 and B3, respectively. Then, 

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity NEET>Chapter 3 - Current Electricity>TOPICWISE QUESTIONS>Q 89

A hot electric iron has a resistance of 80 Ω and is used on a 200 V source. The electrical energy spent, if it is used for 2 h will be, 

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity NEET>Chapter 3 - Current Electricity>TOPICWISE QUESTIONS>Q 90
The supply voltage to a room is 120 V. The resistance of the lead wires is 6 Ω. A 60 W bulb is already switched on. What is the decrease in the voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb?