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संबंधित प्रश्न
What do you understand by the term "potential difference"?
A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference is there between its ends?
What p.d. is needed to send a current of 6 A through an electrical appliance having a resistance of 40 Ω?
How does the resistance of a metallic wire depend on its temperature? Explain with reason.
Calculate the potential difference between the two terminals of a battery if 100 joules of work is required to transfer 20 coulombs of charge from one terminal of the battery to the other.
The figure shows a circuit. When the circuit is switched on, the ammeter reads 0.5 A.
(i) Calculate the value of the unknown resistor R.
(ii) Calculate the charge passing through the 3 Ω resistor in 120 s.
(iii) Calculate the power dissipated in the 3 Ω resistor.
Two bulbs are marked 100 W, 220 V and 60 W, 110 V. Calculate the ratio of their resistances.
How will you conclude that the same potential difference (voltage) exists across three resistors connected in a parallel arrangement to a battery?
Name a device that helps to maintain a potential difference across conductors.
Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities of the spheres (σ1/σ2 ) is ______
