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प्रश्न
Give one example to show how the resistance depends on the nature of material of the conductor.
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उत्तर
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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:
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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 :
- the effective resistance of the circuit.
- 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.
