A long straight wire of circular cross-section (radius a) carries a steady current I, which is uniformly distributed across its cross-section. The magnetic field is:

Question

Physics · Magnetic Effects of Current

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Share:

Correct answer

Directly proportional to r in the region r a

Save this question and verified answer as a clean study sheet with live clickable link.

👥

Challenge your peer aspirants on WhatsApp or Telegram to solve this question!

Online Test Series

Practice full-length mock tests with real exam timers, instant score analysis, and all-India ranking.

Chapter Practice

Want more practice questions on Magnetic Effects of Current?

Solve complete topic-wise tests with detailed solutions on GkGet.

Recommended practice questions in Physics · Magnetic Effects of Current

The arrival of which commission in India triggered widespread protests, including mass hartals across the country in 1928?

Which of the following leaders was instrumental in initiating and leading India’s struggle for independence?

Answer 1

Uniform in the region r a

Answer 2

Directly proportional to r in the region r a

Answer 3

Inversely proportional to r in the region r a

Answer 4

Zero in the region r a

Related Practice Questions