Advertisements
Advertisements
प्रश्न
Two resistors having resistance 8 Ω and 12 Ω are connected in parallel. Find their equivalent resistance.
Advertisements
उत्तर
Let R be the equivalent resistance
∴ `1/"R" = 1/"R"_1 + 1/"R"_2`
`1/"R" = 1/8 + 1/12`
= `(3 +2)/24`
`1/"R" = 5/24`
R = `24/5`
= 4.8 Ω
or R = `("R"_1"R"_2)/("R"_1 + "R"_2)`
= `(8 xx 12)/((8 + 12))`
= 4.8 Ω
APPEARS IN
संबंधित प्रश्न
How can three resistors of resistances 2 Ω, 3 Ω and 6 Ω be connected to give a total resistance of 4 Ω ?
How many 176 Ω resistors (in parallel) are required to carry 5 A on a 220 V line?
Show how would you join three resistors, each of resistance 9 Ω so that the equivalent resistance of the combination is
1) 13.5
2) 6 Ω
State the law of combination of resistances in parallel.
An electric heater which is connected to a 220 V supply line has two resistance coils A and B of 24 Ω resistance each. These coils can be used separately (one at a time), in series or in parallel. Calculate the current drawn when:
(a) only one coil A is used.
(b) coils A and B are used in series.
(c) coils A and B are uses in parallel.
In the diagram shown below, the cell and the ammeter both have negligible resistance. The resistor are identical.
Four resistors each of resistance 2Ω are connected in parallel. What is the effective resistance?
Tick (✓) the correct choice among the following :
Consider two cases of two parallel current carrying conductors. Current in
th e same direction and currents in th e opposi te directions will produce
Calculate equivalent resistance in the following cases:
A coil in the heater consumes power P on passing current. If it is cut into halves and joined in parallel, it will consume power:
