How much work is done when 5 C charge moves across a p.d. of 1 V?

एका वाक्यात उत्तर

Work done = charge x potential difference
Or, W = 5 x 1 = 5 J

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पाठ 4: Electricity and Magnetism - Exercise 4.1 iii [पृष्ठ १७५]

पाठ 4 Electricity and Magnetism
Exercise 4.1 iii | Q 6 | पृष्ठ १७५

Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5 A current in 5 minutes.

What do the letters p.d. stand for?

What is the SI unit of potential difference?

Keeping the potential difference constant, the resistance of a circuit is halved. By how much does the current change?

What is Ohm's law? Explain how it is used to define the unit of resistance.

Five resistors of different resistances are connected together as shown in the figure. A 12 V battery is connected to the arrangement.

Calculate:
(i) the total resistance in the circuit
(ii) the total current flowing in the circuit.

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?

Name the instrument which is used to measure the potential difference.

Twenty-seven drops of the same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.

Study the following circuit and find: