Advertisements
Advertisements
प्रश्न
Are the lights in your house wired in series?
Advertisements
उत्तर
No, the lights in the house are wired in parallel.
APPEARS IN
संबंधित प्रश्न
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.
Two resistances when connected in parallel give resultant value of 2 ohm; when connected in series the value becomes 9 ohm. Calculate the value of each resistance.
If current flows through two lamps arranged:
(a) in series,
(b) in parallel,
and the filament of one lamps breaks, what happens to the other lamp? Explain your answer.
Four resistors each of resistance 2Ω are connected in parallel. What is the effective resistance?
Five resistors, each 3 Ω, are connected as shown in Fig. Calculate the resistance
- between the points P and Q.
- between the points X and Y.
What are the advantages of a parallel connection?
The circuit diagram Fig shows three resistors 2 Ω, 4 Ω and R Ω connected to a battery of e.m.f. 2 V and internal resistance 3 Ω. If main current of 0.25 A flows through the circuit, find:
- the p.d. across the 4 Ω resistor,
- the p.d. across the internal resistance of the cell,
- the p.d. across the R Ω or 2 Ω resistors
- the value of R.
An electrical appliance has a rating 100 W, 120V. The resistance of element of appliance when in use:
An electrical appliance having a resistance of 200 Ω is operated at 200 V. Calculate the energy consumed by the appliance in 5 minutes in kWh.
How does the resistance of a metallic wire depend on the length of wire?
How does the resistance of a metallic wire depend on the thickness of wire?
A given wire is stretched to double its length. How will its resistance change?
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?
The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is:
Calculate the current flows through the 10 Ω resistor in the following circuit.
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:
Two V-I graphs A and B for series and parallel combinations of two resistors are as shown. Giving reason state which graph shows (a) series, (b) parallel combination of the resistors.
A particular resistance wire has a resistance of 3·0 ohm per metre. Find the resistance of 5 m length of a wire of the same material, but with twice the area of cross section.
