Advertisements
Advertisements
प्रश्न
Find the equivalent resistance between points A and B.
उत्तर
Let RP be the equivalent resistance of the resistors 12 Ω, 6 Ω and 4 Ω connected in parallel. Hence, we have
`1/R_p = 1/12 + 1/6 + 1/4`
`= (1+ 2+3)/12 = 1/2`
Rp = 2Ω
Therefore, the equivalent resistance of the circuit is
2Ω + Rp + 5Ω = 2Ω + 2Ω + 5Ω = 9Ω
Thus, the equivalent resistance between points A and B is 9Ω .
APPEARS IN
संबंधित प्रश्न
Find the expression for the resistors connected in series and write the two characteristics of it. (Draw figure).
Why is the series arrangement not used for domestic circuits?
Write any two characteristics of a series combination of resistors.
Find the equivalent resistance between points A and B
Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?
Name the material which is used for making the heating element of an electric iron.
You are supplied with a number of 100 Ω resistors. How could you combine some of these resistors to make a 250 Ω resistor?
A graph is plotted taking p.d. along y-axis and electric current along x-axis. Name the physical quantity that represents the slope of this graph (Fig.).
How does the resistance of an alloy, vary with temperature?
