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Question 19: NCERT Solutions for 12th Class Physics: Chapter 5-Magnetism and Matter
A telephone cable at a place has four long straight horizontal wires carrying a current of 1.0 A in the same direction east to west. The earth’s magnetic field at the place is 0.39 G, and the angle of- dip is 35°. The magnetic declination is nearly zero. What are the resultant magnetic fields at point 4.0 cm below the cable?
Solution:
Let us first decide the directions which can best represent the situation.
Telephone cable carry a total current of 4.0 A in direction east to west. We want resultant magnetic field 4.0 cm below.
Check the complete chapter with solutions.
NCERT Solutions for 12th Class Physics: Chapter 5-Magnetism and Matter