## Book: Xam idea - Science

### Chapter: 13. Magnetic Effects of Electric Current

#### Subject: Physics - Class 10th

##### Q. No. 19 of Proficiency Exercise

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19
##### How will the magnetic field produced at a point P by a current carrying-circular coil change if we increase thei. value of current flowing through the coil,ii. distance of the point P from the coil,iii. number of turns of the coil?

i.
The magnetic field is directly proportional to the magnitude of current flowing through a current carrying coil. There is increase in the magnetic field strength with the increase in current.

ii. The distance of point P is inversely proportional to the strength of magnetic field at P. Thus, more the distance, lesser is the magnetic field strength.

iii. The number of turns is directly proportional to the magnetic field strength. More the number of turns, more is the magnetic field strength.

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