Advertisements
Advertisements
प्रश्न
Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.
Advertisements
उत्तर
The resistors R2, R3 and R4 in series.
∴ R' = R2 + R3 + R4
= 2 + 3 + 5 = 10 Ω
Now R' and R5 are in parallel.
∴ `1/("R"'') = 1/("R"') + 1/"R"_5`
`= 1/10 + 1/10 = 2/10 = 1/5`
∴ R'' = 5 Ω
Now R1, R” and R6 in series between the points A and B. The equivalent resistance between A and B is
R = R1 + R” + R6 = 2 + 5 + 5 = 12 Ω
APPEARS IN
संबंधित प्रश्न
Calculate the resistance of an aluminium cable of length 10 km and diameter 2.0 mm if the resistivity of aluminium is 27 × 10−8 Ωm.
The diagram below shows part of a circuit:
If this arrangement of three resistors was to be replaced by a single resistor, its resistance should be:
(a) 9 Ω
(b) 4 Ω
(c) 6 Ω
(d) 18 Ω
State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator.
You have three resistors of values 2 `Omega`, 3 `Omega`, and 5 `Omega`. How will you join them so that the total resistance is less than 2 `Omega`?
Choose the correct alternative and rewrite the following:
You are given three equal resistances. In how many combinations can they are arranged?
A given metallic wire of resistance R is doubled on itself. What will be its new resistance?
Write an expression for calculating electrical power in terms of current and resistance.
You are provided with three resistors of resistance 1.0 Ω, 2.0 Ω and 3.0 Ω How would you connect them to obtain the total effective resistance 1.5 Ω? Draw diagram of the arrangement and check it by calculations.
2Ω resistor A, 1Ω resistor B and 4Ω resistor C are connected in parallel. The combination is connected across a 2V battery of negligible resistance. Draw the diagram of the arrangement and calculate:
(i) The current in each resistor A and C,
(ii) The current through battery.
If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be:
