A. bad, good
B. bad, bad
C. good, bad
D. good, good
A. zero
B. 0.707 lagging
C. unity
D. 0.707 leading
A. it is filled below core level
B. it is filled above core level
C. it is fully empty
D. none of the above
A. The amount of heat generated can be controlled accurately
B. Heat at very high rate can be gene-rated
C. The area of the surface over which heat is produced can be accurately controlled
D. All of the above
A. To avoid initial rush of current
B. To avoid change in kW rating with temperature
C. Both (A) and (B)
D. Either (A) or (B)
A. By disconnecting some of the heating elements
B. By varying the operating voltage
C. By varying the current through heating elements
D. By any of the above method
A. copper alloy
B. carbon
C. tungsten alloy
D. stainless steel alloy