On which of the following variables heat convected depends ?

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The change in flux linkages can be caused in which of the following ways ?

A. The flux is constant with respect to time and is stationary and the coil moves through it B. The coil is stationary with respect to flux and the flux varies in magnitude with respect to time C. Both the changes mentioned above occur together, i.e., the coil moves through a time varying field D. … The change in flux linkages can be caused in which of the following ways ?Read More...

The mcrease in heat dissipation by air blasts is due to increase in______________?

A. conduction B. convection E. radiation D. any ofthe above...

Tractive magnets are operated from____________?

A. a.c. supply B. d.c. supply C. either a.c. or d.c. supply D. none of the above...

In transformers using hot rolled steel, the cross-section of the yoke is made about __________ greater than that of the core?

A. 5 percent B. 10 percent C. 15 percent D. 30 percent E. none of the above...

___________ brushes are fragile and cause excessive wear of commutator?

A. Natural graphite B. Hard carbon C. Electro graphitic D. Metal graphite...