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What is the Unit of Electric Current?

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प्रश्न

What is the unit of electric current?

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उत्तर

The SI unit of electric current is ampere and is denoted by the letter, A.

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अध्याय 4: Electricity - Exercise 2 [पृष्ठ १९६]

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लखमीर सिंग Physics Part 1 [English] Class 10
अध्याय 4 Electricity
Exercise 2 | Q 7. | पृष्ठ १९६

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संबंधित प्रश्न

Which of the following units could be used to measure electric charge?

(a) ampere
(b) joule
(c) volt
(d) coulomb


How many microamperes are there in 1 ampere?


 An electrician has wired a house in such a way that if a lamp gets fused in one room of the house, all the lamps in other rooms of the house stop working. What is the defect in the wiring?


Two resistors of 2.0 Ω and 3.0 Ω are connected (a) in series (b) in parallel, with a battery of 6.0 V and negligible internal resistance. For each case draw a circuit diagram and calculate the current through the battery. 


A cell supplies a current of 1.2 A through two 2 Ω resistors connected in parallel. When the resistors are connected in series, it supplies a current of 0.4 A. Calculate:

(i) the internal resistance and (ii) e.m.f. of the cell. 


What kind of plot would you except when current (I) is plotted against potential difference (V) for a conductor, at constant temperature?

Is electric potential a scalar or a vector physical quantity?

Name the physical quantity which defines the rate of flow of charge.

Explain the meaning of the statement 'the current rating of a fuse is 5 A'.

A 720 W heater operates from a 220 V line voltage. Calculate:
(a) The electrical energy consumed by the heater in 3 h.
(b) The cost of electrical energy consumption at the rate of 60 paise per kWh.


Name the unit which a consumer pays as the cost of electricity.

What type of electricity is supplied to us at houses?

Two cells each having an e.m.f. of 2 V and an internal resistance of \(2,\Omega\) are connected in series as shown in Fig. What is the current flowing through the circuit in each case?


An electric bulb is rated at 220 V, 100 W.

  1. What is its resistance?
  2. What safe current can be passed through it?

An ammeter is always placed in parallel with the circuit.


For current to flow, one needs art open circuit.


What is the rate at which charges flow past a point on a circuit?


A continuous and closed path of an electric current is called:


Which of the following correctly represents the formula for electric current?


What happens when the switch in a circuit is turned OFF (open circuit)?


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