Regarding the safe use of electricity, which of the following statements is incorrect________
A. When using electric kettles and rice cookers, the metal casing should be grounded
B. Usually, when replacing the light bulb, the switch of the branch circuit where the light bulb is located must be disconnected first.
C. Do not touch or wipe electrical appliances such as lamps and lanterns in working condition with wet hands or with a damp cloth to prevent electric shock
D. When using the electroscope to identify the phase (fire) line, the metal body at the front end of the pen should be connected to the phase (fire) line, and the hand should not touch the metal body at the end of the pen.
Answer:D
Regarding the safe use of electricity, which of the following statements is incorrect________
A. When using electric kettles and rice cookers, the metal casing should be grounded B. Usually, when replacing the light bulb, the switch of the branch circuit where the light bulb is located must be disconnected first. C. Do not touch or wipe electrical appliances such as lamps and lanterns in working condition with wet hands or with a damp cloth to prevent electric shock D. When using the electroscope to identify the phase (fire) line, the metal body at the front end of the pen should be connected to the phase (fire) line, and the hand should not touch the metal body at the end of the pen.