Class 10
NCERT Exemplar
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Chapter 12: Electricity
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The resistivity does not change if
In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?
In an electrical circuit two resistors of 2 and 4 respectively are connected in series to a 6 V battery. The heat dissipated by the 4 resistor in 5 s will be
Chapter 13: Magnetic Effects of Electric Current
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Chapter 16: Sustainable Management of Natural Resources
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Question 14:
In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?
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Text solution
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Since all the three bulbs are connected in parallel so potential difference (V) across all the bulbs is same. Power dissipated is given by
.
Lower the resistance, higher the power dissipation. Hence higher the brightness.
Out of all the three bulbs, 100 W bulb will have minimum resistance because rated voltage of all the bulbs will be same and its power dissipation is maximum.
Thus, 100 W will have maximum brightness and 40 W bulb will have minimum brightness.
Hence, the correct answer is option C.
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| Question Text | Question 14: In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness? |
| Updated On | Feb 28, 2023 |
| Topic | Electricity |
| Subject | Science |
| Class | Class 10 |
| Answer Type | Text solution:1 Video solution: 5 |
| Upvotes | 651 |
| Avg. Video Duration | 3 min |
