हिंदी

Give One Example to Show How the Resistance Depends on the Nature of Material of the Conductor.

Advertisements
Advertisements

प्रश्न

 Give one example to show how the resistance depends on the nature of material of the conductor.

Advertisements

उत्तर

 If we take two similar wires with equal length and diameter, one made of copper (metal) and the other made of nichrome (alloy), we will find that the resistance of the nichrome wire is about 60 times more than that of the copper wire. This shows that the resistance of a conductor depends on the nature of the material of the conductor.
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Electricity - Exercise 4 [पृष्ठ २१४]

APPEARS IN

लखमीर सिंग Physics Part 1 [English] Class 10
अध्याय 4 Electricity
Exercise 4 | Q 19. (a) | पृष्ठ २१४

संबंधित प्रश्न

Find the equivalent resistance between points A and B


Write down an expression for the resistance of a metallic wire in terms of the resistivity.


Calculate the combined resistance in the given case:


Name the physical quantity that represents the ratio of potential difference and current.

Define resistivity of a metal.

Potential difference between two points of a wire carrying 2 ampere current is 0.1 volt. Calculate the resistance between these points.

Calculate the equivalent resistance of the following combination of resistor r1, r2, r3, and r4


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 :

  1. the effective resistance of the circuit.
  2. the reading of ammeter.


Two bulbs of 100 W and 40 W are connected in series. The current through the 100 W bulb is 1 A. The current through the 40 W bulb will be ______.


State the effect of rise in temperature on the resistance of semi-conductors.


Write an expression for the resistance of a conducting wire in terms of its length and area of cross-section.


How does the resistivity of an alloy such as constantace depends on temperature.


What is a resistance? Define it with respect to Ohm’s law,


Four resistances of 2.0Ω each are joined end to end, to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent comers.


2Ω resistor A, 1Ω resistor B and 4Ω resistor C are connected in parallel. The combination is connected across a 2V battery of negligible resistance. Draw the diagram of the arrangement and calculate:
(i) The current in each resistor A and C,
(ii) The current through battery.


Illustrate-combination of cells e.g., three cells, in series, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.


What should be the length of a nickel wire of area of cross-section 3 mm2 used for making a rheostat of 750 ohm? (ρ of nickle = 0.069 Ohm mm2/m)


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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×