Electric Charges
Electric Charges
Electric charges: We already know that atoms are made of protons neutrons and electrons. The positively charged particles in an atom are called protons. The negatively charged particles are called electrons. The atom as a whole consist of an equal number of positive and negative charges, and in such a case of the atom is said to be electrically neutral. If, however the charges are not balanced, the object will have an electric charge (positive charge if protons are more in number than electrons and negative charge if electrons are more in number than protons. If two objects having the same type of charge are brought close together, they repel each other (i.e. push each other away) however if the two objects having the opposite type of charge. (positive- negative or negative-positive), they attract each other. Therefore, we can say, like charges repel each other and unlike charges attract each other
-ve charged body Body has gained electrons and +ve charged body
Body has lost some electrons
Properties of Electric Charge:
Electroscope is a device used to confirm the presence of charge and its, nature on a body. The simplest type of electroscope is a pith ball electroscope.
Five balls numbered 1 to 5 are suspended using separate threads. Pairs (1,2), (2,4), (4,1) show electrostatic attraction, while pairs (2,3) and (4,5) show repulsion. Therefore ball 1 must be : | |||
| Right Option : C | |||
| View Explanation | |||
Device which can be used to test whether an object is carrying charge or not is know as ____________________ | |||
| Right Option : A | |||
| View Explanation | |||
A charged glass rod attracts a charged plastic straw. | |||
| Right Option : A | |||
| View Explanation | |||
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