283. What is the formula for the area of the magnet in the design of PMDC motors? a) area of magnet = flux * 4.95 * residual flux density b) area of magnet = flux / 4.95 * residual flux density c) area of magnet = flux * 4.95 / residual flux density
283. What is the formula for the area of the magnet in the design of PMDC motors? a) area of magnet = flux * 4.95 * residual flux density b) area of magnet = flux / 4.95 * residual flux density c) area of magnet = flux * 4.95 / residual flux density
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Answer: b
Explanation: First the residual flux density is calculated. Next, the flux is calculated and
substitution in the formula gives the area of magnet.