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Q. 25

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 831

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Short Answer

Magnetic resonance imaging needs a magnetic field strength of . The solenoid is long and in diameter. It is tightly wound with a single layer of diameter superconducting wire. What size current is needed?

The current needed is

See the step by step solution

Step by Step Solution

Step 1: Given information

We have given,

Magnetic field strength =

Length =

Diameter =

We have to find the current through the solenoid.

Step 2: Simplify

We know the magnetic field which is produced by uniform shape solenoid at its center.

The magnetic field is

where N is the no. of turns and L is the length of the solenoid.

Then current will be,

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