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Four students connect 4 cells of 1.5 V e...

Four students connect 4 cells of 1.5 V each to get a battery of voltage 6 V. State the incorrect connection / connections. Justify your answer.

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A, B and C are incorrect connections (D is correct).
Because for a proper series connection of four cells, each of 1.5 V to obtain a battery of 6 V, the negative terminal of each cell should be connected to the positive terminal of the nextcell or the positive terminal of each cell shouldbe connected to the negative terminal of the next cell (connection D).
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KUMAR PRAKASHAN-ELECTRICITY-OBJECTIVE QUESTIONS AND ANSWERS (Answer the following questions as directed (Miscellaneous):)
  1. In a voltmeter there are 20 divisions between 0 mark and 0.5 V mark....

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  2. To verify the Ohm.s law a circuit diagram was drawn by a student as sh...

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  3. Four students connect 4 cells of 1.5 V each to get a battery of voltag...

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  4. Which of the following statements is correct? (a) one volt is one j...

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  5. Keeping the resistance constant, the potential difference applied acro...

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  6. Keeping the potential difference constant, the resistance of a circuit...

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  7. A potential difference of 10 V is needed to make a current of 0.02 A f...

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  8. A current of 200 mA flows through a 4 kOhm resistor. What is the poten...

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  9. The electrical resistivities of four materials A, B, C and D are given...

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  10. The equivalent resistance of a series combination of two resistors is ...

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  11. An electric lamp is labelled 12 V, 36 W. This indicate that it should ...

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  12. Name two devices whose working is based on the heating effect of elect...

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  13. Name the gases which are filled into the filament-type electric light ...

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  14. Why are the filament-type electric light bulbs not power efficient?

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  15. Under what conditions is the Ohm.s law applicable?

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  16. Why is Nichrome used as a heating element?

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  17. Why are Constantan and Manganin used for making standard resistors?

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  18. Why is lead-tin alloy used for making a fuse?

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  19. What is the difference between a resistor ~ and resistance?

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  20. What do you mean by the term load in an electric circuit?

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