Question

A steady current carrying wire produces in the neighborhood:
A. Electric and magnetic field
B. Electric field only
C. Magnetic field only
D. No field

Answer 1

Hint: A steady current carrying wire such as a metal wire produces what types of forces around the circles. As we know that it produces forces according to Biot Savart's law.

Complete answer:
Firstly, we define the Biod - Savaot's law. According to the Biod- savart's law, the magnetic field generated by a constant electric current. It relates the magnetic field to the magnitude direction, length and the electric current. So, the magnetic field of a current element is given by
\[dB=\dfrac{{{\mu }_{0}}Idl\sin \theta }{4\pi {{r}^{2}}}\]
As we know that a current carrying conductor, such as a metal wire will produce a magnetic field around it, the motion of charge around the wire in the form of concentric circles. So, According to the laws of electromagnetism a current carrying conductor is a neutral species unless an external charge or electric field is applied to it. So, the conductor does not induce any electric field around itself. However, a magnetic field is produced in the surroundings.

So, the correct answer is “Option C”.

Note:
Here, the current carrying wire produces the magnetic field according to the laws of electromagnetism. So, the magnetic field is produced while the current carrying wire in the form of concentric circles.
Hence, the magnetic field is given by Biot savort, law is
\[dB=\dfrac{{{\mu }_{0}}Idl\sin \theta }{4\pi {{r}^{2}}}\]
Be careful during the problem on the calculation of the problem on electromagnetism.