Advertisements
Advertisements
प्रश्न
What is the equivalent resistance of 5 equal resistors, each of value 2`Omega` 1 when oonnected in (a) Series ( b) ParaIleI?
Advertisements
उत्तर
(a) In series:
Equivalent series resistance, Rs = 2 + 2 + 2 + 2 + 2 = 10 `Omega`
(b) In parallel
Equivalent parallel resistance RP = `("Resistance of each resistor"/"No. of Resistors") = 2/5 Omega`
APPEARS IN
संबंधित प्रश्न
With a neat labelled diagram and derive the equation for three resistances connected in parallel.
Two resistors, with resistance 5 Ω and 10 Ω respectively are to be connected to a battery of emf 6 V so as to obtain:
(i) minimum current flowing
(ii) maximum current flowing
(a) How will you connect the resistances in each case?
(b) Calculate the strength of the total current in the circuit in the two cases.
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.
How will you connect three resistors of resistances 2 Ω, 3 Ω, and 6 Ω to obtain a total resistance of 4 Ω, and 1 Ω?
Which of the following combinations have the same equivalent resistance between X and Y?
A combination consists of three resistors in series. Four similar sets are connected in parallel. If the resistance of each resistor is 2 ohm, find the resistance of the combination.
A battery of e.m.f. 15 V and internal resistance 2 `Omega` is connected to tvvo resistors of 4 ohm and 6 ohm joined.
(i) In series,
(ii) In para 1 lel. Find in each case the electrica I energy spent per minute in 6 ohm resistor.
A given wire is stretched to double its length. How will its resistance change?
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:
Three resistors of 1 Ω, 2 Ω and 3 Ω are connected in parallel. The combined resistance of the three resistors should be:
