Physics · 2023
JEE Main · 24 January 2023, Shift 2 · Q26
If a copper wire is stretched to increase its length by 20%. The percentage increase in resistance of the wire is ____ %.
If a copper wire is stretched to increase its length by $\displaystyle 20$%. The percentage increase in resistance of the wire is $\displaystyle \_\_\_\_$%.
Official answer
From NTA’s final answer key for this paper.
44
More from Current Electricity
- The H amount of thermal energy is developed by a resistor in 10 s when a current of 4 A is passed through it. If the current is increased to 16A, the…2023
- Two cells are connected between points A and B as shown. Cell 1 has emf of 12 V and internal resistance of 3 Ω. Cell 2 has emf of 6V and internal…2023
- 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…2026
- The number of electrons flowing per second in the filament of a 110 W bulb operating at 220 V is: (Given e=1.6 × 10^-19 C )2024
- Refer to the circuit diagram given below. The heat generated across the 6 Ω resistance in 100 second is (α)/100 J. The value of α is ____. (Nearest…2026
- The equivalent resistance of the circuit shown below between points a and b is:2023
- To determine the resistance (R) of a wire, a circuit is designed below. The V-I characteristic curve for this circuit is plotted for the voltmeter…2024
- The resistance per centimeter of a meter bridge wire is r, with X Ω resistance in left gap. Balancing length from left end is at 40 cm with 25 Ω…2024
JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.