Ram wants to find out if a metal sphere is charged.
He took a new metal sphere, charged it positive and brought close to the first one. He noticed that they attract when close. He concluded that the first sphere must be negatively charged.
Did Ram get it right?
Ram wants to find out if a metal sphere is charged.
He took a new metal sphere, charged it positive and brought close to the first one. He noticed that they attract when close. He concluded that the first sphere must be negatively charged.
Did Ram get it right?
The correct option is B No
Ram concluded by showing that the opposite charges attract. Quite smart of him but he forgot that the gifted sphere could have been neutral as well. Ram's new positively charged sphere would have attracted a neutral sphere as well. Hence attraction is not really a sure test. So to give a sure result we need to perform one more step. Bring a new negatively charged sphere near to the gifted sphere. If it still attracts- the sphere must have been neutral. If it repels, you very well know of what nature it should be?
NEGATIVE
From this we have learnt that repulsion is the sure test for confirming the presence of charge on two bodies.
No
Ram concluded by showing that the opposite charges attract. Quite smart of him but he forgot that the gifted sphere could have been neutral as well. Ram's new positively charged sphere would have attracted a neutral sphere as well. Hence attraction is not really a sure test. So to give a sure result we need to perform one more step. Bring a new negatively charged sphere near to the gifted sphere. If it still attracts- the sphere must have been neutral. If it repels, you very well know of what nature it should be?
NEGATIVE
From this we have learnt that repulsion is the sure test for confirming the presence of charge on two bodies.
