Advertisements
Advertisements
प्रश्न
A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω, 0.5 Ω and 12 Ω, respectively. How much current would flow through the 12 Ω resistor?
Advertisements
उत्तर
When equivalent resistances are connected in series,
R = R1 + R2 + R3 + R4 + R5
R1 = 0.2 Ω, R2 = 0.3 Ω, R3 = 0.4 Ω, R4 = 0.5 Ω, R5 = 12 Ω ....(Given)
R = 0.2 + 0.3 + 0.4 + 0.5 + 12
R = 13.4 Ω
V = IR ....(According to Ohm’s law)
I = `"V"/"R"`
= `9/13.4`
= 0.67 A
There will be no division of electric current because the resistors are connected in series.
0.67 A of electric current will flow in a 12 Ω resistor.
APPEARS IN
संबंधित प्रश्न
Why is the series arrangement not used for domestic circuits?
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.
How does the resistance of a pure metal change if its temperature decreases?
Name a substance of which the resistance remains almost unchanged by the increase in temperature.
Name the following substances:
(i) Showing low resistivity,
(ii) Showing very high resistivity,
(iii) Showing moderate resistivity.
What potential difference is needed to drive a current o f 1 A through a 5 Ω resistor?
Three resistors of 6.0 Ω, 2.0 Ω and 4.0 Ω are joined to an ammeter A and a cell of emf 6.0 V as shown in the following figure. Calculate :
- the effective resistance of the circuit.
- the reading of ammeter.
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
What material is used for making wire to prepare heating coils? Give a reason.
State expression for Resistance connected in series.
State expression for Resistance connected in parallel.
What is a resistance? Define it with respect to Ohm’s law,
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.
In the circuit shown below, calculate the equivalent resistance between the points (i) A and B, (ii) C and D.
Illustrate-combination of cells e.g., three cells, in parallel, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then:
