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If 20 C of charge pass a point in a circ...

If 20 C of charge pass a point in a circuit in 1s, what current is flowing?

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The correct Answer is:
20A
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The rate of flow of charge in a circuit is called electric current. In other words, it is the amount of charge flowing per second. It is denoted by the letter I. If Q is the charge which is flowing through a conductor in time t, then current is given by i = Q/t Unit of current: The S.I unit of current is ampere and it is denoted by the letter 'A'. The S.I unit of Q is coulomb and that oft is second. Thus, the S.I unit of electric current is ("1 coulomb")/("1 second") = 1A If there is a current of 10 amperes in a circuit for 10 minutes, what quantity of electric charge flows in through the circuit?

The rate of flow of charge in a circuit is called electric current. In other words, it is the amount of charge flowing per second. It is denoted by the letter I. If Q is the charge which is flowing through a conductor in time t, then current is given by i = Q/t Unit of current: The S.I unit of current is ampere and it is denoted by the letter 'A'. The S.I unit of Q is coulomb and that oft is second. Thus, the S.I unit of electric current is ("1coulomb")/("1 second") = 1A How much current must there be in a circuit if 100 coulombs flow past a point in the circuit in 4 seconds?

LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. Compare how an ammeter and a voltmeter are connected in a circuit.

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  2. What do the following symbols mean in circuit diagrams?

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  3. If 20 C of charge pass a point in a circuit in 1s, what current is flo...

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  4. A current of 4A flows around a circuit for 10s. How much charge flows ...

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  5. What is the current in a circuit if the charge passing each point is 2...

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  6. Fill in the following blanks with suitable words: (a) A current is a...

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  7. (a) Name a device which helps to maintain potential difference across ...

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  8. (a) What is an electric current? What makes an electric current flow i...

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  9. What is an ammeter? How is it connected in a circuit? Draw a diagram t...

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  10. (a) Write down the formula which relates electric charge, time and ele...

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  11. आदर्श अमीटर का प्रतिरोध क्या होना चाहिए ?

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  12. Draw circuit symbols for (a) fixed resistance (b) variable resistance ...

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  13. What is a circuit diagram? Draw the labelled diagram of an electric ci...

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  14. If the charge on an electron is 1.6 xx 10^(-19) coulombs, how many ele...

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  15. The p.d. across a lamp is 12 V. How many joules of electrical energy a...

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  16. In 20s, a charge of 25 C leaves a battery, and 200J of energy are deli...

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  17. (a) Define electric current. What is the SI unit of electric current. ...

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  18. The outer name of potential difference is:

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  19. Which statement/statement is/are correct? 1. An ammeter is connected...

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  20. Which unit could be used to measure current?

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