Physics-10th Electricity CBSE Board 2025 Medium
A wire of length 'l' is gradually stretched so that its length increases to 3l. If its original resistance is…
A wire of length '' is gradually stretched so that its length increases to . If its original resistance is , then its new resistance will be :
- (a)
- (b)
- (c)
- (d)
🔒 Step-by-step solution
Sign up free to reveal the full worked solution — hints, steps and the final answer, with a Solve-with-us walkthrough.
More questions from Electricity
Class 10 Physics-10th — every question with an expert-verified, step-by-step solution.
- Q1 A piece of wire of resistance R is cut into five equal parts. These…
- Q1 What does an electric circuit mean?
- Q2 Which of the following terms does not represent electrical power …
- Q2 Define the unit of current.
- Q3 An electric bulb is rated 220 V and 100 W. When it is operated on…
- Q3 Calculate the number of electrons constituting one coulomb of c…
- Q4 Two conducting wires of the same material and of equal lengths and…
- Q5 How is a voltmeter connected in the circuit to measure the pote…
- Q6 A copper wire has diameter 0.5 mm and resistivity of 1.6 \times 10^…
- Q7 The values of current I flowing in a given resistor for the corresp…
- Q8 When a 12 V battery is connected across an unknown resistor, there i…
- Q9 A battery of 9 V is connected in series with resistors of 0.2\ \O…