When a resistance R is across a cell, the voltage across ...
When a resistance R is across a cell, the voltage across the terminals of the cell is reduced to two-third of its normal value. The internal resistance of the cell is
\(\frac{2}{1}\)R
\(\frac{1}{2}\)R
\(\frac{3}{2}\)R
5R
Correct answer is B
IR = \(\frac{2}{3}\) I(R + r)
r = \(\frac{1}{2}\)R
An example of a mechanical wave is--------- ...
Determine the potential difference. V across the parallel resistors ...
The differences observed in solids, liquids and gases may be accounted for by ...
Which of the following phenomena CANNOT be explained by the molecular theory of matter? ...
The pressure at any point in a liquid at rest depends only on the ...
Mach number is used in connection with the speed of ...
A short response time is obtained in a liquid-in-glass thermometer when the ...