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प्रश्न
Bends in a rubber pipe reduce the flow of water through it. How would the bands in a wire affect its electric resistance?
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उत्तर
Bends in the wire will not affect its resistance. This is because the electrons are extremely small in size as compared to the bends. So, the electrons can easily change their direction of motion.
संबंधित प्रश्न
The substance having infinitely high electrical resistance is called:
(a) conductor
(b) resistor
(c) superconductor
(d) insulator
Name the material which is used for making the heating element of an electric iron.
How does the resistance of a wire change when:
its length is tripled?
State how are the two resistors joined with a battery when equivalent resistance is more than either of the two resistances.
To increase the effective resistance in a circuit, the resistors are connected in _______________ .
Choose the correct alternative and rewrite the following sentence.
If three resistors 2 ohms, 3 ohms and 4 ohms are connected in series, then the effective resistance in the circuit will be _______ ohms.
Calculate the equivalent resistance between the points A and B for the following combination of resistors:
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:
