combination of cells and maximum power theorem questions with solutions

Showing 1–10 of 26 questions

• IntegermediumCurrent electricitycombination of cells and maximum power theorem

  Two cells of emfs 1 V and 2 V and internal resistances 2 Ω and 1 Ω respectively are connected in series with an external resistance of 6 Ω, giving current I₁. The same cells are then connected in parallel with the same external resistance, giving current I₂. If I₁/I₂ = x/3, find x.

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  JEE Mains 2025 3 April Evening Shift

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• MCQeasyCurrent electricitycombination of cells and maximum power theorem

  Two identical heater filaments are connected first in parallel and then in series. At the same applied voltage, the ratio of heat produced in the same time, parallel : series, is:

  Options

  • Option A

    1 : 2

  • Option B

    4 : 1

  • Option C

    1 : 4

  • Option D

    2 : 1

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  JEE Mains11 April 2023Shift 1Morning Shift

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• MCQeasyCurrent electricitycombination of cells and maximum power theorem

  There are n identical electric bulbs. Each bulb is designed to draw power P when connected independently across the mains voltage. The n bulbs are now connected in series across the same mains supply. The total power drawn is:

  Options

  • Option A

    P/n²

  • Option B

    P/n

  • Option C

    P

  • Option D

    nP

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  JEE Mains 2025 4 April Evening Shift

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• NumericmediumCurrent electricitycombination of cells and maximum power theorem

  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.

  

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  JEE Mains 2024 08 Apr Evening Shift

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• MCQmediumCurrent electricitycombination of cells and maximum power theorem

  For the two cells having same EMF E and internal resistance r, the current passing through the external resistor 6 Ω is same when both the cells are connected either in parallel or in series. The value of internal resistance r is _______ Ω.

  Options

  • Option A

    3

  • Option B

    4

  • Option C

    9

  • Option D

    6

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  JEE Mains 202628 January Morning Shift

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• MCQeasyCurrent electricitycombination of cells and maximum power theorem

  By what percentage will the illumination of the lamp decrease if the current drops by 20%?

  Options

  • Option A

    46%

  • Option B

    26%

  • Option C

    36%

  • Option D

    56%

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  JEE Mains 2024 31 Jan Evening Shift

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• MCQeasyCurrent electricitycombination of cells and maximum power theorem

  A metallic wire has variable cross sectional area. Cross sectional area at cd is twice the area at ab. The wire is connected to a cell as shown. Find the ratio of heat dissipated per unit volume at section cd to that at section ab.

  

  Options

  • Option A

    1/4

  • Option B

    1/2

  • Option C

    2

  • Option D

    4

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• NumericmediumCurrent electricitycombination of cells and maximum power theorem

  Two cells are connected in opposition as shown. Cell E₁ is of 8 V emf and 2 Ω internal resistance; the cell E₂ is of 2 V emf and 4 Ω internal resistance. The terminal potential difference of cell E₂ is:

  

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  JEE Mains 2024 30 Jan Morning Shift

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• IntegermediumCurrent electricitycombination of cells and maximum power theorem

  Two cells of emfs 1 V and 2 V and internal resistances 2 Ω and 1 Ω, respectively, are connected in parallel with the same polarity and supply a current of 1 A through an external resistance R. The polarity of the 1 V cell is then reversed while the external resistance remains unchanged. If the new current through R is α ÷ 5 A, find α.

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  JEE Mains 2026 6 April Evening Shift

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• MCQeasyCurrent electricitycombination of cells and maximum power theorem

  An electric bulb rated 50 W – 200 V is connected across a 100 V supply. The power dissipation of the bulb is:

  Options

  • Option A

    12.5 W

  • Option B

    25 W

  • Option C

    50 W

  • Option D

    100 W

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  JEE Mains 2024 04 Apr Evening Shift

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