1. Which of the following is true about the total magnetic field resulting from a collection of moving charges? a. It is equal to the vector sum of the individual fields b.It is equal to the sum of the reciprocals of the individual fields. c. It is equal to the product of the current and distance covered by the moving charges d. It is equal to the product of the current and velocity of each charge
1. Which of the following is true about the total magnetic field resulting from a collection of moving charges?
a. It is equal to the vector sum of the individual fields
b.It is equal to the sum of the reciprocals of the individual fields.
c. It is equal to the product of the current and distance covered by the moving charges
d. It is equal to the product of the current and velocity of each charge.
2. A toroid or inner radius 203.50 mm and an outer radius of 500.98 mm carries
a. 186
b. 154
c. 215
d. 301
3. When does magnetic force become repellent in the case of parallel current-carrying wires?
a. when currents flow in similar directions
b.when currents flow conventionally, or westward
c. when currents flow in opposite directions
d. when currents flow uncoventionally, or eastward
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