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equivalent resistance questions with solutions
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 23 questions
- MCQmediumCurrent electricity
To measure the temperature coefficient of resistivity α of a semiconductor, an electrical arrangement shown in the figure is prepared. The arm BC is made up of the semiconductor. The experiment is being conducted at 25°C and resistance of the semiconductor arm is 3 mΩ. Arm BC is cooled at a constant rate of 2°C/s. If the galvanometer G shows no deflection after 10s, then α is:
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JEE Mains 2024 01 Feb Evening Shift
Open question & full solution → - MCQeasyCurrent electricity
Four resistors have values R₁ = R₂ = R₃ = 5 Ω and R₄ = 10 Ω. Which circuit shown in the original figure gives an equivalent resistance of 6 Ω?
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JEE Mains 2025 4 April Evening Shift
Open question & full solution → - NumericeasyCurrent electricity
A wire of resistance 20 Ω is divided into 10 equal parts. A combination of two parts are connected in parallel and so on. Now resulting pairs of parallel combination are connected in series. The equivalent resistance of final combination is _______ Ω.
JEE Mains 2024 05 Apr Evening Shift
Open question & full solution → - MCQmediumCurrent electricity
Two known resistance of R Ω and 2R Ω and and one unknown resistance X Ω are connected in a circuit as shown in the figure. If the equivalent resistance between points A and B in the circuit is X Ω, then the value of X is ________ Ω.
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JEE Mains 202621 January Evening Shift
Open question & full solution → - MCQmediumCurrent electricity
A wire of length 25 m and cross-sectional area 5 mm² has resistivity 2×10⁻⁶ Ω m. It is bent into a complete circle. The resistance between diametrically opposite points is:
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JEE Mains 2025 3 April Morning Shift
Open question & full solution → - NumericmediumCurrent electricity
Equivalent resistance of the following network is _____ Ω.
JEE Mains 2024 31 Jan Morning Shift
Open question & full solution → - MCQdifficultCurrent electricity
Find equivalent resistance between points A and B in the circuit shown.
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Current Electricity Objective Conversion
Open question & full solution → - IntegereasyCurrent electricity
In the symmetric resistor network shown in the original question figure, every resistor has resistance R. If the equivalent resistance across A and B is NR/2, find N.
JEE Mains 2025 22 Jan Evening Shift
Open question & full solution → - MCQmediumCurrent electricity
The effective resistance between A and B, if resistance of each resistor is R, will be
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JEE Mains 2024 09 Apr Evening Shift
Open question & full solution → - MCQmediumCurrent electricity
A regular n-sided polygon is made from a uniform wire of total resistance R. The equivalent resistance between two adjacent vertices is:
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JEE MainsJEE Advanced
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