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संबंधित प्रश्न
What is the SI unit of potential difference?
Keeping the potential difference constant, the resistance of a circuit is doubled. By how much does the current change?
What p.d. is needed to send a current of 6 A through an electrical appliance having a resistance of 40 Ω?
A current of 200 mA flows through a 4 kΩ resistor. What is the p.d. across the resistor?
What current will be taken by a 920 W appliance if the supply voltage is 230 V?
The V-I graph for a series combination and for a parallel combination of two resistors is shown in Fig – 8.38. Which of the two, A or B, represents the parallel combination? Give a reason for your answer.
A cell of e.m.f 2.0 V and internal resistance 1Ω is connected to the resistors of 3Ω and 6Ω in series. Calculate:
(i) the current drawn from the cell,
(ii) the p.d. across each resistor,
(iii) the terminal voltage of the cell and
(iv) the voltage drop.
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is doubled itself.
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance if the wire is stretched to double its length?
Inside a hollow charged spherical conductor, the potential ______
