CUET Preparation Today
A wire of resistance 4 Ω is used to make a coil of radius 7 cm. The wire has a diameter of 1.4 mm and the resistivity of its material is $2 × 10^{-7}Ω m$. The number of turns in the coil will be |
70 40 140 20 |
70 |
The correct answer is Option (1) → 70 |
