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संबंधित प्रश्न
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the ratio `"R"/"R'"` is ______.
(i) Two sets A and B, of three bulbs each, are glowing in two separate rooms. When one of the bulbs in set A is fused, the other two bulbs also cease to glow. But in set B, when one bulb fuses, the other two bulbs continue to glow. Explain why this phenomenon occurs.
(ii) Why do we prefer arrangements of Set B for house circuiting?
V = IRTwo resistances X and Y are connected turn by turn : (i) in parallel, and (ii) series. In which case the resultant resistance will be less than either of the individual resistances?R = R1+ R2+ R3
State the order of resistivity of (i) a metal, (ii) a semiconductor and (iii) an insulator.
When do you say that the resistors are connected in this way? Draw a circuit diagram.
How does the resistivity of a semiconductor depend on temperature?
State expression for Resistance connected in parallel.
State a relation between electrical power, resistance and potential difference in an electrical circuit.
Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances.
