Advertisements
Advertisements
Question
How will you oonnect five resistors, each of the value one ohm, to obtain an equivalent resistance of 0.2 `Omega`
Advertisements
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
If the length of a wire is doubled by taking more of wire, what happens to its resistance?
Give the law of combination of resistances in series.
If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combination is :
(a) 0.1 Ω
(b) 10 Ω
(c) 20 Ω
(d)40 Ω
State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator.
Name the following substance showing low resistivity.
How does the resistivity of an alloy such as constantace depends on temperature.
Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.

Calculate the value of the resistance which must be connected to a 15 ohm resistance to provide on effective resistance of 6 ohm.
