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(a) Name a device which helps to maintai...

(a) Name a device which helps to maintain potential difference across a conductor (say, a bulb).
(b) If a potential difference of 10V causes a current of 2A to flow for 1 minute, how much energy is transferred?

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The correct Answer is:
(a) Cell or Battery (b) 1200 J
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. What is the current in a circuit if the charge passing each point is 2...

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

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

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

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

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

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  7. आदर्श अमीटर का प्रतिरोध क्या होना चाहिए ?

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

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

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

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

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

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

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  14. The outer name of potential difference is:

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

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  16. Which unit could be used to measure current?

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  17. If the current through a flood lamp is 5A, what charge passes in 10 se...

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  18. If the amount of electric charge passing through a conductor in 10 min...

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  19. A student made an electric circuit shown here to measure the current t...

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  20. Draw a circuit diagram to show how 3 bulbs can be lit from a battery s...

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