Advertisements
Advertisements
Question
What is the equivalent resistance between the points X and Y for the given network?
Advertisements
Solution
An equivalent circuit for the combination
`1/"R" = 1/"R"_1 + 1/"R"_2 + 1/"R"_3`
R1 = 5 + 3 = 8 Ω
R2 = 8 Ω
R3 = 1 + 3 = 4 Ω
`1/"R" = 1/8 + 1/8 + 1/4`
`1/"R" = (1 + 1 + 2)/8`
`= 4/8 = 1/2`
R = 2 Ω
RELATED QUESTIONS
An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A
If the length of a wire is doubled by taking more of wire, what happens to its resistance?
Name the material which is the best conductor of electricity.
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.).
State expression for Resistance connected in parallel.
Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.
What should be the length of a nickel wire of area of cross-section 3 mm2 used for making a rheostat of 750 ohm? (ρ of nickle = 0.069 Ohm mm2/m)
Calculate the quantity of heat that will be produced in a coil of resistance 75 Ω if a current of 2A is passed through it for 2 minutes.
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then:
In an electrical circuit, two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be ______.
