Home
Class 12
PHYSICS
A certain volume of copper is drawn into...

A certain volume of copper is drawn into a wire of radius a and is wrapped in shape of a helix having radius `r ( gt gt a)`. The windings are as close as possible without overlapping. Self inductance of the inductor so obtained is `L_(1)`. Another wire of radius 2 a is drawn using same volume of copper and wound in the fashion as described above. This time the inductance is `L_(2)`. Find `(L_(1))/(L_(2))`

Text Solution

Verified by Experts

The correct Answer is:
`8:1`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    ARIHANT|Exercise Level 2|39 Videos

  • ELECTROMAGNETIC INDUCTION

    ARIHANT|Exercise Level 3|12 Videos

  • CURRENT ELECTRICITY

    ARIHANT|Exercise Current Electricity|105 Videos

  • ELECTROSTATICS

    ARIHANT|Exercise Level 3|59 Videos

Similar Questions

Explore conceptually related problems

One kg of copper is drawn into a wire of 1 mm diameter and a wire of 2 mm diameter. The resistance of the two wires will be in the ratio

A sphere of radius 3cm is drawn into a wire of thickness of 0.5cm. What is the length of the wire?

1kg piece of copper is drawn into a wire 1mm thick and another piece into a wire 2mm thick. Compare the resistance of these wires.

A copper sphere of radius 3 cm is beaten and drawn into a wire of diameter 0.2 cm. The length of the wire is :

A copper rod of radius 2cm and length 7 cm is drawn into a wire of length 112 cm of uniform thickness. The thickness of the wire is :

On making a coil of copper wire of length  and coil radius r, the value of self inductance is obtained as L. If the coil of same wire, but of coil radius r/2, is made, the value of self inductance will be-

A toroid is wound over a circular core. Radius of each turn is r and radius of toroid is R (gt gt r) . The coefficient of self-inductance of the toroid is given by

Obtain an expression for the self inductance of a straight solenoid of length l and radius r (l > > r).

A fixed volume of iron is drawn into a wire of length l . The extension produced in this wire by a constant force F is proportional to