Advertisements
Advertisements
Question
How will you oonnect five resistors, each of the value one ohm, to obtain an equivalent resistance of 0.2 `Omega`
Solution
Five resistors each of value 1 ohm s hou Id be connected in paral le I to obtain an equivalent resistance of O. 2 ohm.
Equivalent parallel resistance RP = `("Resistance of each resistor"/"No. of resistors") = 1/5 = 0.2 Omega`
APPEARS IN
RELATED QUESTIONS
Find the equivalent resistance between A and B
Name the material which is the best conductor of electricity.
What possible values of resultant resistance one can get by combining two resistances, one of value 2 ohm and the other 6 ohm?
A p.d. of 4 V is applied to two resistors of 6 Ω and 2 Ω connected in series. Calculate:
(a) the combined resistance
(b) the current flowing
(c) the p.d. across the 6 Ω resistor
State the effect of rise in temperature on the resistance of semi-conductors.
Write an expression for the resistance of a conducting wire in terms of its length and area of cross-section.
Three resistors of 6Ω, 3Ω and 2Ω are connected together so that their total resistance is greater than 6Ω but less than 8Ω Draw a diagram to show this arrangement and calculate its total resistance.
Six equal resistors of 1 ohm each are connected to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves it at D.
Two resistors of 4Ω and 6Ω are connected in parallel to a cell to draw 0.5 A current from the cell. Calculate the current in each resistor.
With the help of a circuit diagram derive the formula for the resultant resistance of three resistances connected:
- in series and
- in parallel