With reference to electric charges, identify the INCORRECT statement.
Lightning conductor can be used to predict lightning strike.
A lightning conductor cannot be used to predict a lightning strike; it is used to protect buildings from lightning strikes. Therefore, statement 1 is incorrect.
Two balls, A and B, are thrown simultaneously, a vertically upward with a speed of 20 m/s from the ground and B vertically downward from a height of 40 m with the same speed and along the same line of motion. At what points do the two balls collide by taking acceleration due to gravity as 9.8 m/s 2?
On the basis of which principle does soap clean surfaces?
Which one of the following devices is used to measure atmospheric pressure?
Which one of the following energy is stored in the links between the atoms?
Who among the following has explained the phenomenon of photoelectric effect?