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प्रश्न
How does the resistance of an alloy, vary with temperature?
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उत्तर
The resistance of an alloy remains nearly unaffected by the change in temperatue.
संबंधित प्रश्न
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
Name the following substance showing low resistivity.
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.
Calculate the equivalent resistance between the points A and B for the following combination of resistors:
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.
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then:
