Advertisements
Advertisements
प्रश्न
A battery of e.m.f 16 V and internal resistance 2 Ω is connected to two resistors 3Ω and 6Ω connected in parallel. Find:
- the current through the battery.
- p.d. between the terminals of the battery,
- the current in 3 Ω resistors,
- the current in 6 Ω resistor.
Advertisements
उत्तर
E.m.f. of battery E = 16V, r = 2Ω
Effective resistance of 3Ω and 6Ω connected in parallel R is
`1/"R" = 1/3 + 1/6`
= `3/6`
= `1/2`
∴ R = 2Ω
Total resistance = (R + r)
= (2 +2)
= 4Ω
(a) Current through battery
I = `"V"/("R" + r) = "E"/("R" +r)`
I = `(16V)/(4Ω)`
= 4 A
(b) p.d between terminal of battery
V = IR
= 4 × 2
= 8V
(c) The current in 3Ω resistor
I1 = `"V"/"R"`
= `8/3`
= 2.66 A
(d) The current in 6Ω resistor
I2 = `"V"/"R"`
= `8/6`
= 1.34 A
APPEARS IN
संबंधित प्रश्न
A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistances, which may be used separately, in series, or in parallel. What are the currents in the three cases?
A resistor of 8 ohms is connected in parallel with another resistor X. The resultant resistance of the combination is 4.8 ohms. What is the value of the resistor X?
Are the lights in your house wired in series?
Two exactly similar electric lamps are arranged (i) in parallel, and (ii) in series. If the parallel and series combination of lamps are connected to 220 V supply line one by one, what will be the ratio of electric power consumed by them?
Solve the following question:
In an electric circuit, two resistors of 12 0 each are joined in parallel to a 6 V battery. Find the current drawn from the battery.
How does the resistance of a metallic wire depend on the length of wire?
A piece of wire having a resistance R is cut into five equal parts.
- How will the resistance of each part of the wire change compared with the original resistance?
- If the five parts of the wire are placed in parallel, how will the resistance of the combination change?
- What will be ratio of the effective resistance in series connection to that of the parallel connection?
Three resistors of 1 Ω, 2 Ω and 3 Ω are connected in parallel. The combined resistance of the three resistors should be:
Three resistors of 6Ω, 4Ω and 4Ω are connected together so that the total resistance is 8Ω. Draw a diagram to show this arrangement and give reason to justify your answer.
Four resistors each of resistance 5 Ω are connected in parallel. What is the effective resistance?
