Advertisements
Advertisements
प्रश्न
Give one example to show how the resistance depends on the nature of material of the conductor.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
Why is the series arrangement not used for domestic circuits?
Find the equivalent resistance between points A and B.

Name the material which is the best conductor of electricity.
How does the resistance of a wire change when:
its diameter is tripled?
What is (a) highest, and (b)Ω lowest, resistance which can be obtained by combining four resistors having the following resistances?
4 Ω, 8 Ω, 12 Ω, 24 Ω
You are supplied with a number of 100 Ω resistors. How could you combine some of these resistors to make a 250 Ω resistor?
You have three resistors of values 2 `Omega`, 3 `Omega`, and 5 `Omega`. How will you join them so that the total resistance is less than 2 `Omega`?
Calculate the equivalent resistance of the following combination of resistor r1, r2, r3, and r4

Choose the correct alternative and rewrite the following sentence.
If three resistors 2 ohms, 3 ohms and 4 ohms are connected in series, then the effective resistance in the circuit will be _______ ohms.
Choose the correct alternative and rewrite the following:
You are given three equal resistances. In how many combinations can they are arranged?
Name the material of wire used for making standard resistances. Give a reason.
What material is used for making wire to prepare heating coils? Give a reason.
Why are thick copper wires used as connecting wires?
How does the resistivity of a semiconductor depend on temperature?
Illustrate-combination of cells e.g., three cells, in series, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.
Calculate the quantity of heat that will be produced in a coil of resistance 75 Ω if a current of 2A is passed through it for 2 minutes.
Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances.
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?
