Advertisements
Advertisements
Question
What is the maximum resistance which can be made using five resistors each of 1/5 Ω?
Options
1/5 Ω
10 Ω
5Ω
1Ω
Solution
1Ω
Explanation -
Resistance will be maximum when all the five resistors are connected in series.
`"R"_("max") = 1/5 + 1/5 + 1/5 + 1/5 + 1/5`
`"R"_"max" = 1Ω`
APPEARS IN
RELATED QUESTIONS
Define specific resistance.
How does specific resistance of a semi-conductor change with the increase in temperature?
What is the S.I unit of electrical conductivity?
Distinguish between the resistivity and conductivity of a conductor.
The resistivity of insulators is of the order of:
The proper representation of series combination of cells obtaining maximum potential is
![]() |
![]() |
![]() |
![]() |
(i) | (ii) | (iii) | (iv) |
Three 2 Ω resistors, A, B and C, are connected as shown in Figure. Each of them dissipates energy and can withstand a maximum power of 18 W without melting. Find the maximum current that can flow through the three resistors?
What is electrical resistivity of a material? What is its unit? Describe an experiment to study the factors on which the resistance of conducting wire depends.
Write the relationship between electrical resistance and electrical resistivity for a metallic conductor of a cylindrical shape. Hence derive the SI unit of electrical resistivity.
State the order of specific resistance of an insulator.