Write your question here (Keep it simple and clear to get the best answer)two resistor of 4ohm and 5ohm parallel are connected to the terminal of a battery consisting of four dry cells each having an emf of 1.5v in series. If the 4ohm resistor is 0.8ohm find the current in the 6ohm resistor and the internal resistance of the battery. I need answers
Answers
Explanation:
Ohm’s Law
The current that flows through most substances is directly proportional to the voltage V applied to it. The German physicist Georg Simon Ohm (1787–1854) was the first to demonstrate experimentally that the current in a metal wire is directly proportional to the voltage applied:
I
∝
V
.
This important relationship is known as Ohm’s law. It can be viewed as a cause-and-effect relationship, with voltage the cause and current the effect. This is an empirical law like that for friction—an experimentally observed phenomenon. Such a linear relationship doesn’t always occur.
Resistance and Simple Circuits
If voltage drives current, what impedes it? The electric property that impedes current (crudely similar to friction and air resistance) is called resistance R. Collisions of moving charges with atoms and molecules in a substance transfer energy to the substance and limit current. Resistance is defined as inversely proportional to current, or
I
∝
1
R
.
Thus, for example, current is cut in half if resistance doubles. Combining the relationships of current to voltage and current to resistance gives
I
=
V
R