मराठी

What is the Conventional Direction of the Flow of Electric Current? How Does It Differ from the Direction of Flow Electrons?

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प्रश्न

What is the conventional direction of the flow of electric current? How does it differ from the direction of flow electrons?

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उत्तर

The conventional direction of the flow of electric current is from the positive terminal of a cell or a battery to its negative terminal through the outer circuit, whereas the direction of flow of electrons is from the negative terminal to the positive terminal of a cell.

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पाठ 4: Electricity - Exercise 2

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लखमीर सिंह Physics [English] Class 10
पाठ 4 Electricity
Exercise 2 | Q 26.4

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

What is the Flow of Charge Called?


A current of 4 A flows around a circuit for 10 s. How much charge flows past a point in the circuit in this time?


<p> Define the unit of electric current (or Define ampere).


The figure given below shows an electric circuit in which current flows from a 6 V battery through two resistors. 

 

  1. Are the resistors connected in series with each other or in parallel?
  2. For each resistors, state the p.d. across it.
  3. The current flowing from the battery is shared between the two resistors. Which resistor will have bigger share of the current?
  4. Calculate the effective resistance of the two resistors.
  5. Calculate the current that flows from the battery.

What happens to the other bulbs in a series circuit if one bulb blows off?


Which is the better way to connect lights and other electrical appliances in domestic wiring: series circuits or parallel circuits? why?


 Christmas tree lamps are usually wired in series. What happens if one lamps breaks?


Consider the circuit given below when A, B and C are three identical light bulbs of constant resistance.   

(a) List the bulbs in order of increasing brightness.
(b) If C burns out, what will be the brightness of A now compared with before?
(c) If B burns out instead, what will be the brightness of A and C compared with before?


Three resistors of 6.0 𝛀, 2.0𝛀 and 4.0𝛀 are joined to an ammeter A and a cell of e.m.f. 6.0 V as
shown in fig 8.52 Calculate:
(a) the effective resistance of the circuit and
(b) the reading of ammeter. 

 


Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of 1.5 V, 5 Ω, 10 Ω and 15 Ω resistors and a plug key, all connected in series.


The diagram shows two ways of connecting three lamps P, Q and R to A.C. supply of 220 V.

Name the two arrangements. Which of them would you prefer in a household circuit? Give a reason for your answer.

Name the principle on which a transformer works.


Transformers are usually designed so that their efficiency is as close to 100% as possible. Describe two features in transformer design which help to achieve high efficiency?

Calculate the current through a 60 W lamp rated 250 V. If the line voltage falls to 200 V, how is power consumed by the bulb affected?


An electric bulb is rated '100 W, 250 V'. How much current will the bulb draw if connected to a 250 V supply?


Answer the following question.
An electric lamp of resistance 20 Ω and a conductor of resistance 4 0 are connected to a 6 V battery as shown in the circuit. Calculate: 

(a) the total resistance of the circuit,  

(b) the current through the circuit, 

(c) the potential difference across the  (i) electric lamp and (ii) conductor, and

(d) power of the lamp.


State the condition when it is advantageous to connect cells in series.


An electrical gadget can give an electric shock to its user under certain circumstances. Mention any two of these circumstances.


The power of an electric device is a product of ______ and ______.


Match the following:

1. 1 mA a. series
2. 1 pA b. ohmmeter
3. Ammeter  c. 10-6 ampere
4. Electrical resistivity d. 10-3 ampere

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