- The switch should be connected between the lamp and neutral
- The metal shell of the electrical appliance does not need a ground wire
- In the existing lighting circuit, when adding high-power electrical appliances, you only need to replace the fuse with a thick enough
- When the circuit is cut off by the fuse device, the cause of the accident should be found first, and then the power supply should be restored after elimination.
- more length
- less radius
- less length
- more radius
- specific latent heat of fusion
- latent heat of vaporization
- latent heat of fusion of a solid
- specific latent heat of vaporization
- The connection of the switch in the picture is wrong
- The electrical appliances in the home circuit should be connected in parallel
- When using the test pen, your fingers should not touch the metal body of the pen tail
- The blown fuse may be caused by the total power of the electrical appliance being too large
- 45 cm, of the size of object
- 90 cm, smaller than object
- 30 cm, bigger than object
- – 45 cm smaller than object
- Remains unchanged
- Increases
- Decreases
- First increases then decrease to zero
- When using electric kettles and rice cookers, the metal casing should be grounded
- Usually, when replacing the light bulb, the switch of the branch circuit where the light bulb is located must be disconnected first.
- 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
- 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.
- 0.9 eV
- 1.2 eV
- 1.8 eV
- 0.5 eV
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