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प्रश्न
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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
How does the presence of impurities in a metal affect its resistance?
Give one example to show how the resistance depends on the nature of material of the conductor.
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.
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
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 parallel.
Illustrate-combination of cells e.g., three cells, in series, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.
