Answer:
c) current
Explanation:
Ohm's law states that the current I flowing through a conductor of resistance R is directly proportional to the voltage or potential difference V applied across its terminals provided that the temperature and other necessary conditions remain constant.
Mathematically this law can be written as follows;
When we make R the subject of formula from equation (1), we get the following;
We have to speed up the watch so we need to decrease time period of pendulum. So we hv to reduce the length.
As the bright sun shines upon the water, the water slowly dissapears. This is an example of physical change because here the water is just transformed into water vapour. So only the state and the shape of the substance has changed. Its originality remains absolutely intact. In the second case where the same sunlight gives energy to the surrounding plants to convert water and carbon dioxide into sugar and oxygen gas, it is a chemical change. here new substances are formed and the identity of the original substances are lost.In chemical reactions, the mass of the product will always be the same as the mass of the reactants.
Answer:
In metals there are free electrons at normal temperature so when we increase temperature it resistivity gets increases,so conductivity decreases,while in semiconductor the electrons are not free so when we increase the temperature the covalent bonds begin to break and the electron becomes free so conductivity get.
Explanation: