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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
In series combination which remains constant?
(a) Voltage
(b) Current
(c) Both current and voltage
(d) Both are variables
Complete the following :-
(a)
If the equivalent resistance is to be increased, then the number of resistances should be connected in
- Series
- Parallel
- Mixed arrangement
- None of the above
Find the equivalent resistance between points A and B
If the length of a wire is doubled by taking more of wire, what happens to its resistance?
Name the following substances:
(i) Showing low resistivity,
(ii) Showing very high resistivity,
(iii) Showing moderate resistivity.
Answer the following question.
While studying the dependence of potential difference ( V) across a resistor on the current (I) passing through it, in order to determine the resistance of the resistor, a student took 5 readings for different values of current and plotted a graph between V and t. He got a straight line graph passing through the origin. What does the straight-line signify? Write the method of determining the resistance of the resister using this graph.
What is a resistance? Define it with respect to Ohm’s law,
With the help of a circuit diagram derive the formula for the resultant resistance of three resistances connected:
- in series and
- in parallel
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then:
