Physics
When the main switch of the house is put off it disconnects the

Live wire only
Earth wire and the neutral wire
Live wire and the earth wire
Live wire and the neutral wire

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Physics
A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

None
The liquid surface falls down on the direction of motion and rises up on the back side of the tank
The liquid surface falls down only at the center of the tank
The surface of the liquid remains horizontal

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