Advertisements
Advertisements
प्रश्न
How does the resistance of an alloy, vary with temperature?
Advertisements
उत्तर
The resistance of an alloy remains nearly unaffected by the change in temperatue.
संबंधित प्रश्न
When a 4 Ω resistor is connected across the terminals of a 12 V battery, the number of coulombs passing through the resistor per second is:
(a) 0.3
(b) 3
(c) 4
(d) 12
Give the law of combination of resistances in series.
Calculate the combined resistance in each case:

What potential difference is needed to drive a current o f 1 A through a 5 Ω resistor?
What do you mean by power rating of an electrical appliance? How do you use it to calculate
(a) the resistance of the appliance and
(b) the safe limit of the current in it, while in use?
When do you say that the resistors are connected in this way? Draw a circuit diagram.
Write an expression for the resistance of a conducting wire in terms of its length and area of cross-section.
State expression for Resistance connected in series.
State expression for Resistance connected in parallel.
In an electrical circuit, two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be ______.
