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Question 22: NCERT Solutions for 12th Class Physics: Chapter 4-Moving Charges and Magnetism
The wires which connect the battery of an automobile to its starting motor carry a current of 300 A (for a short time). What is the force per unit length between the wires if they are 70 cm long and 1.5 cm apart? Is the force attractive or repulsive?
Solution:
Two wires connecting battery of an automobile to the starting motor carry 300 A current in opposite direction. So, the force is repulsive between them. Force per unit length
Check the complete chapter with solutions.
NCERT Solutions for 12th Class Physics: Chapter 4-Moving Charges and Magnetism