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Practice Current electricity for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
Showing 1–10 of 48 questions
- MCQmediumCurrent electricity
Two bulbs one of 200 volts, 60 watts and the other of 200 volts, 100 watts are connected in series to a 200 volt supply. The power consumed will be
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JEE MainsNEET
Open question & full solution → - MCQeasyCurrent electricity
By what percentage will the illumination of the lamp decrease if the current drops by 20%?
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JEE Mains 2024 31 Jan Evening Shift
Open question & full solution → - MCQeasyCurrent electricity
An electric bulb rated 50 W – 200 V is connected across a 100 V supply. The power dissipation of the bulb is:
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JEE Mains 2024 04 Apr Evening Shift
Open question & full solution → - Multi-correctmediumCurrent electricity
The resistance R is adjusted so that the power dissipated in the 2 Ω resistor is maximum. Under this condition, select the correct statements.
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JEE Advanced
Open question & full solution → - MCQmediumCurrent electricity
In a large building, there are 15 bulbs of 40W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1 kW. The voltage of the electric mains is 220 V. The minimum capacity of the main fuse of the building will be :
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JEE Mains 2014
Open question & full solution → - MCQmediumCurrent electricity
Three long conducting plates A, B and C carry charges +q, -2q and +q as shown. Plates A and C are fixed. If switch S is closed and l₁ > l₂, determine the initial direction of motion of the middle plate B.
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JEE Mains
Open question & full solution → - MCQeasyCurrent electricity
An electric power line having total resistance of 2 Ω, delivers 1 kW of power of 250 V. The percentage efficiency of transmission line is ____ .
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JEE Mains 202622 January Evening Shift
Open question & full solution → - NumericmediumCurrent electricity
A heater is designed to operate with a power of 1000 W in a 100 V line. It is connected in combination with a resistance of 10 Ω and a resistance R, to a 100 V mains as shown in figure. For the heater to operate at 62.5 W, the value of R should be ______ Ω.
JEE Mains 2024 08 Apr Evening Shift
Open question & full solution → - MCQmediumCurrent electricity
A rigid container with thermally insulated walls contains a coil of resistance 100 Ω, carrying current 1A. Change in internal energy after 5 min will be
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JEE Advanced
Open question & full solution → - MCQeasyCurrent electricity
A mobile-phone battery is rated 4.2 V, 5800 mAh. The energy stored when fully charged is:
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JEE Mains 2025 2 April Morning Shift
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