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Resistance and Resistivity for NEET: 19 solved questions

Real NEET 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 1988 to 2020. No sign-in needed to read them.

What this topic asks

• Resistance of a wire and stretching — 8 questions
• Temperature dependence of resistance — 4 questions
• Ohm's law and resistivity — 2 questions
• Limitations of Ohm's law — 2 questions
• Colour code of carbon resistors — 2 questions
• Resistivity of various materials — 1 question

All 19 questions with solutions

• The resistance of a wire is R ohm. If it is melted and stretched to n times its original length, its new resi… NEET 2017
• A wire of resistance 4 Ω is stretched to twice its original length. The resistance of stretched wire would be NEET 2013
• A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance b… CBSE AIPMT 2008
• The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then CBSE AIPMT 2004
• A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance… CBSE AIPMT 2004
• Three copper wires of lengths and cross-sectional areas are (l, A), (2l, A/2) and (l/2, 2A). Resistance is mi… CBSE AIPMT 1997
• A wire 50 cm long and 1 mm² in cross-section carries a current of 4 A when connected to a 2 V battery. The re… CBSE AIPMT 1994
• The masses of the wires of copper is in the ratio of 1 : 3 : 5 and their lengths are in the ratio of 5 : 3 :… CBSE AIPMT 1988
• The resistance of a discharge tube is CBSE AIPMT 1999
• From the graph between current (I) and voltage (V) is shown. Identify the portion corresponding to negative r… CBSE AIPMT 1997
• The color code of a resistance is given below. The bands, in order, are Yellow, Violet, Brown and Gold. The v… NEET 2020
• A carbon resistor of (47±4.7) kΩ is to be marked with rings of different colours for its identification. The… NEET 2018
• Identify the set in which all the three materials are good conductors of electricity. CBSE AIPMT 1994
• Which of the following graph represents the variation of resistivity (ρ) with temperature (T) for copper? NEET 2020
• The solids which have the negative temperature coefficient of resistance are NEET 2020
• Specific resistance of a conductor increases with CBSE AIPMT 2002
• Copper and silicon is cooled from 300 K to 60 K, the specific resistance CBSE AIPMT 2001
• Two rods are joined end to end, as shown. Both have a cross-sectional area of 0.01 cm². Each is 1 metre long.… Karnataka NEET 2013
• Two wires of the same metal have same length, but their cross-sections are in the ratio 3:1. They are joined… CBSE AIPMT 1995