An air gap is usually inserted in magnetic circuits to

While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?

A. E.M.F.

B. Current

C. Current density

D. Conductivity

Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it

A. Lowers their power efficiency

B. Increases their cost of manufacture

C. Leads to their increased weight

D. Produces fringing

The unit of magnetic flux is

A. Henry

B. Weber

C. Ampere-turn/weber

D. Ampere/metre

Laminated cores, in electrical machines, are used to reduce

A. Copper loss

B. Eddy current loss

C. Hysteresis loss

D. All of the above