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CURRENT �ELECTRICITY

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Hello Friends…….!

Come along with me.

Let us see some basic terms related to current electricity.

Welcome friends to the world of current electricity.

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Frame 01�Potential Difference

  • Electric current flows from a point of high electric potential to a point of low electric potential. The difference in the potential between two points is called Potential difference.
  • It is measured in volt.
  • Current flow only when there is a potential difference.

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?

Which among the following provide potential difference in the circuit?

  1. Switch [if (a) go to page no. 8]
  2. Cell [if (b) go to page no. 11]
  3. Bulb [if (c) go to page no. 15]
  4. Connecting Wire [if (d) go to page no. 19]

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It is not the correct answer

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Ampere is the unit of electric current.

Go back to frame 2 (Page No. 06) and try to find the correct answer.

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Your answer is wrong

Go back to Frame 03 (Page No. 09)

Read again and try to find the correct answer.

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Frame 02�emf

Electromotive force or emf is the ability to maintain the potential difference between the ends of a conductor. The emf of a source of current is the potential difference between its ends when the source is in an open circuit .

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What is the unit of EMF of a cell?

  1. Newton [if (a) go to page no. 27]
  2. Volt [if (b) go to page no. 22]
  3. Ampere [if (c) go to page no. 04]
  4. Joule [if (d) go to page no. 25]

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Go back to Frame 04 (Page No. 12)

Read again and try to find the correct answer.

Your answer is wrong

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Your answer is wrong

Go back to Frame 01 (Page No. 03)

Read again and try to find the correct answer.

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Switch is used to control the flow of electric current within a circuit.

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The method of connecting cells one after another in such a way that the positive of one cell is connected to the negative of the another cell.

Total emf is the sum of emf of the cells.

Current passing through each cell is the same.

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Frame 03�Series Connection

If 4 cells of 1.5 volt each are connected in series what is the total voltage?

  1. 1.5 V [if (a) go to page no. 05]
  2. 4 V [if (b) go to page no. 13]
  3. 6 V [if (c) go to page no. 16]
  4. 0 V [if (d) go to page no. 23]

?

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Go back to Frame 04 (Page No. 12)

Read again and try to find the correct answer.

Your answer is wrong

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Your answer is correct

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Cell is used in a circuit to provide potential difference for the flow of charges.

You can go to Frame 02 (Page no.06)

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  • The method of connecting similar poles of cells together is called as parallel connection.
  • If the cells have equal emf then the emf of the circuit is the same as that of a single cell.
  • The total current flowing in the circuit splits up and flows through each cell.

Frame 04�Parallel Connection

If 3 cells of 1.5 volt each are connected in parallel what is the total voltage?

  1. 1 V [if (a) go to page no. 07]
  2. 3 V [if (b) go to page no. 18]
  3. 1.5 V [if (c) go to page no. 24]
  4. 4.5V [if (d) go to page no. 10]

?

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Go back to Frame 03 (Page No. 09)

Read again and try to find the correct answer.

Your answer is wrong

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Frame 05�Electric Current

  • Electric current is the flow of electric charges.
  • Current or intensity of current is the quantity of charge that flows through a conductor in a circuit in 1 second.
  • Unit of electric current is Coulomb/second or Ampere.
  • If 10 coulomb charge flows in a circuit in 5 seconds the charge flowing in the circuit in one second will be 10 / 5 equal to 2 A.

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If I is the current Q is the charge and t is the time, find out an equation for electric current

a. I=Q/t [if (a) go to page no. 17]

b. I=Qt [if (b) go to page no. 20]

c. I=Q+t [if (c) go to page no. 26]

d. I=Q-t [if (d) go to page no. 21]

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  • Bulb is the load in a circuit. It produces light from electricity.

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Go back to Frame 01 (Page No. 03)

Read again and try to find the correct answer.

Your answer is wrong

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Your answer is correct

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You can go to Frame 04 (Page no.12)

Total Voltage = 1.5+1.5+1.5+1.5 = 6V

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Your answer is correct

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You can go to (Page no.28)

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Go back to Frame 04 (Page No. 12)

Read again and try to find the correct answer.

Your answer is wrong

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Go back to frame 1 (Page No. 03) and try to find the correct answer.

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  • It is not the correct answer

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Connecting wire is used to connect various components in an electric circuit.

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Go back to Frame 05 (Page No. 14)

Read again and try to find the correct answer.

Your answer is wrong

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Go back to frame 5 (Page No. 14) read again and try to find the correct answer.

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  • It is not the correct answer

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Your answer is correct

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You can go to Frame 03 (Page no.09)

emf is measured in the unit of volt

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Go back to Frame 03 (Page No. 09)

Read again and try to find the correct answer.

Your answer is wrong

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Your answer is correct

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You can go to frame 05 (Page no.14)

If the cells have equal emf then the emf of the circuit is the same as that of a single cell.

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Go back to Frame 02 (Page No. 06)

Read again and try to find the correct answer.

Your answer is wrong

Joule is the unit of work

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Go back to frame 5 (Page No. 14) read again and try to find the correct answer.

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  • It is not the correct answer

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Go back to Frame 02 (Page No. 06)

Read again and try to find the correct answer.

Your answer is wrong

Newton is the unit of force

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Through this journey, we have studied what is potential difference, emf, combination of cells and electric current.

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Hope it is clear.

THANK YOU FRIENDS