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प्रश्न
Conceptual question.
A bird sitting on a high power electric line is still safe. How?
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उत्तर
Birds don’t get shocked when they sit on electrical wires because they are not good conductors of electricity. Electricity flowing through a single power line at 35,000 volts will continue along the path of least resistance and bypass birds, because there is no difference in electrical potential.
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संबंधित प्रश्न
Which of the following statements correctly defines a volt?
(a) a volt is a joule per ampere.
(b) a volt is a joule per coulomb.
Define one coulomb charge.
What do you understand by the term "potential difference"?
A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance?
Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become:
For the circuit shown in the diagram below:
What is the value of:
(i) current through 6 Ω resistor?
(ii) potential difference across 12 Ω resistor?
How will you conclude that the same potential difference (voltage) exists across three resistors connected in a parallel arrangement to a battery?
Define Electric potential.
______ is work done per unit charge.
Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities of the spheres `(σ_1//σ_2 )` is ______.
