Inside a long current carrying solenoid the magnetic field is
Correct answer: C. nearly uniform and parallel to the axis
- A. zero
- B. strongest at the ends
- C. nearly uniform and parallel to the axis
- D. circular around the axis
Explanation
The overlapping fields of the individual turns reinforce along the axis and largely cancel between adjacent turns, giving a field much like that of a bar magnet but uniform inside. Its strength is proportional to the current and to the number of turns per unit length, and inserting a soft iron core multiplies it many times. The field weakens and spreads near the ends.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Magnetic Flux Density
Magnetic flux density measures the magnetic force acting on a current carrying conductor or moving charge in a magnetic field. Work includes the relations B equals F divided by IL and F equals qvB, the tesla as its SI unit, field direction and the distinction between flux density and magnetic flux.
Practise Electromagnetism
1,176 free Electromagnetism MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Magnetic Flux Density questions
To convert a galvanometer into an ammeter, a
A moving coil galvanometer uses a radial magnetic field so that
Two parallel wires carrying currents in the same direction
Soft iron rather than steel is used for the core of an electromagnet because soft iron
The force between the poles of two magnets and the force between two charges are alike in that both
A current carrying coil placed in a uniform magnetic field experiences