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Resistance and Resistivity for GUJCET: 18 solved questions

Real GUJCET paper questions on resistance and resistivity, part of current electricity. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2011 to 2026. No sign-in needed to read them.

What this topic asks

• Temperature dependence of resistance — 8 questions
• Ohm's law and resistivity — 6 questions
• Resistance of a wire and stretching — 4 questions

All 18 questions with solutions

• The masses of three copper wires are in the ratio 5:3:1 and their lengths are in the ratio 1:3:5. The ratio o… GUJCET 2011
• Two wires of the same material having lengths and radii in the ratio of 3:4 and 3:2 respectively are connecte… GUJCET 2014
• When the temperature of a conductor increases, the ratio of its conductivity to its resistivity . GUJCET 2018
• The resistance of the platinum wire of a platinum resistance thermometer at the ice point is 5 Ω and at the s… GUJCET 2020
• At room temperature (27 °C) the resistance of a heating element is 100 Ω. What is the temperature of the elem… GUJCET 2022
• A metal rod of length 10 cm and a rectangular cross-section of 1 cm×1/2 cm is connected to a battery across o… GUJCET 2023; GUJCET 2026
• A silver wire has a resistance of 2.1 Ω at 27.5 °C and a resistance of 2.7 Ω at 100 °C. Then the temperature… GUJCET 2024
• For blind students only : On increasing the temperature of a conductor, for free electrons increases. GUJCET 2026
• A resistive wire is stretched till its length is increased by 100%. Due to the consequent decrease in diamete… GSEB Board July 2015
• At what temperature would the resistance of a copper conductor be double its resistance at 0°C? Given: α for… GSEB Board July 2017
• A wire is uniformly stretched so that its area of cross-section becomes 1/n times the original (n>0). What wi… GSEB Board March 2018
• The unit of conductance of the material of the given conductor is _. GSEB Board March 2019
• According to Ohm's law, R=V/I. As the current flowing through a conductor increases, the resistance of the co… GSEB Board March 2020
• A resistive wire of resistance 10 Ω is stretched to increase its length by 100%. Due to the consequent decrea… GSEB Board March 2020 (old course)
• The resistance of the platinum wire of a platinum resistance thermometer at the ice point is 5 Ω and at the s… GSEB Board August 2020
• According to Ohm's law, the electric current I passing through a conductor is increased in such a way that th… GSEB Board July 2021
• The value of the temperature coefficient of resistivity (α) is for metals. GSEB Board March 2022
• A current density of 2.5 A m⁻² is found to exist in a conductor when an electric field of 5×10⁻⁸ V m⁻¹ is app… RS Academy GUJCET booklet