MCQOPTIONS
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MCQOPTIONS
| 1. |
The frame of electric motor is connected to three plates having earthing resistance of 10 Ω, 20 Ω and 30 Ω respectively. The materials of the three plates are copper, aluminium and iron respectively. The percentage of energy dissipated by 10 Ω earthing plate |
| A. | is more than 50% of total energy |
| B. | is less than 50% of total energy |
| C. | depends on the materials of the three plates |
| D. | may be more or less than 50% of total energy |
| Answer» B. is less than 50% of total energy | |