A. where low voltage and high currents are involved
B. where high voltage and small cur-rents are involved
C. in both of the above cases
D. in none of the above cases
A. current
B. voltage
C. speed
D. none of above
A. magnetic flux, direction of current flow and resultant force
B. magnetic flux, direction of motion and the direction of e.m.f. induced
C. magnetic field strength, induced voltage and current
D. magnetic flux, direction of force and direction of motion of conductor
A. rivets
B. counter sunk screws
C. brazing
D. welding
A. direction of induced e.m.f.
B. direction of flux
C. direction of motion of the conductor if forefinger points in the direction of generated e.m.f.
D. direction of motion of conductor, if forefinger points along the lines of flux
A. motion of conductor
B. lines of force
C. either of the above
D. none of the above
A. copper is harder than mica
B. mica and copper are equally hard
C. mica is harder than copper
D. none of the above
A. mica
B. copper
C. cast iron
D. carbon
A. length of conductor
B. cross-sectional area of the conductor
C. number of conductors
D. all of the above