Advertisements
Advertisements
Question
Why is the series arrangement not used for domestic circuits?
Solution
Series connections are not used in domestic electrical circuits due to the following reasons:
- It cannot be used with different devices (devices) with different switches on and off. If one equipment fails, the other also stops working.
- In series connection, the same current flows through all the devices, which we do not need.
- Due to high total resistance of the circuit (R = R1 + R2 + ...), the value of current becomes extremely low.
APPEARS IN
RELATED QUESTIONS
Name the material which is the best conductor of electricity.
How does the resistance of a pure metal change if its temperature decreases?
The diagram below shows part of a circuit:
If this arrangement of three resistors was to be replaced by a single resistor, its resistance should be:
(a) 9 Ω
(b) 4 Ω
(c) 6 Ω
(d) 18 Ω
State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator.
Name a substance of which the resistance remains almost unchanged by the increase in temperature.
What is the equivalent resistance between A and B in the given circuit (Fig?)
How will you oonnect five resistors, each of the value one ohm, to obtain an equivalent resistance of 0.2 `Omega`
What do you mean by power rating of an electrical appliance? How do you use it to calculate
(a) the resistance of the appliance and
(b) the safe limit of the current in it, while in use?
How does the resistance of an alloy, vary with temperature?
State the effect of rise in temperature on the resistance of semi-conductors.
State expression for Resistance connected in parallel.
Write an expression for calculating electrical power in terms of current and resistance.
Calculate the equivalent resistance between P and Q from the following diagram:
Illustrate-combination of cells e.g., three cells, in parallel, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.
Two wires of the same length and area made of two materials of resistivity ρ1 and ρ2 are connected in series to a source of potential V. The equivalent resistivity for the same area is:
The resistance of the hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamps, when not in use?
What is the maximum resistance which can be made using five resistors each of `1/5` W?
Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of 4 Ω.
Consider the following combinations of resistors:
The combinations having equivalent resistance 1 Q is/are ______.
