- 10.0 m/s
- 20.0 m/s
- 40.0 m/s
- 5.0 m/s
- If someone gets an electric shock, cut off the power first.
- When overhauling circuit faults, try to work under power-on conditions.
- For electrical appliances with metal shells, the metal shell must be grounde
- To ensure circuit safety, try not to use multiple high-power electrical appliances at the same time.
- a conductor
- a semiconductor
- an insulator
- a super conductor
- initial and final state
- time factor
- bulk of matter
- energy change
- Both light and sound waves in air are transverse
- The sound waves in air are longitudinal while the light waves are transverse
- Both light and sound waves in air are longitudinal
- Both light and sound waves can travel in vacuum
- passes through any point in the body
- is situated outside the body
- situated any where
- passes through the centre of mass
- to change the momentum
- to resist any change in its state
- to change its direction
- to change its position
- Current in the circuit is maximum and phase difference between E and I is π/2
- Current in the circuit is maximum and phase difference between E and I is zero
- Voltage is maximum and phase difference between E and I is π/2
- Current is minimum and phase difference between E and I is zero
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