A. Photoelectric effect
B. Electrostatic effect
C. Heating effect
D. Magnetic effect
A. no ageing effect
B. high speed of operation
C. high rupturing capacity
D. all of the above
A. power frequencies
B. higher frequencies entering generator or transformer units
C. either of the above
D. none of the above
A. current carrying contacts called electrodes
B. arc extinguishers
C. circuits to break the system
D. transformers to isolate the two systems
E. any of the above
A. 2
B. 4
C. 6
D. 10
A. connecting lines in parallel
B. connecting lines in series
E. using machines of high impedance
D. reducing the excitation of machines
E. none of the above
A. high temperature
B. increase of mean free path
C. increasing field strength
D. all of the above