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Two heater coils made of the same materi...

Two heater coils made of the same material are connected in parallel across the mains : the length and the diameter of one coil is double that of the other . Which of them will produce more heat?

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To determine which of the two heater coils produces more heat when connected in parallel, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Parameters**: Let the first coil have: - Power: \( P_1 \) - Length: \( L_1 \) ...
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CENGAGE PHYSICS ENGLISH-HEATING EFFECT OF CURRENT-Exercise 7.1
  1. Each of three resistors in fig. 7.12 has a resistance of 2 Omega and c...

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  2. An electric bulb rated 220 V and 60 W is connected in series with anot...

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  3. We have a 30 W, 6 V bulb , which we want to glow by a supply of 120 V ...

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  4. Two heater coils made of the same material are connected in parallel a...

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  5. A series circuit consists of three identical lamps connected to a batt...

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  6. Two wires of the same material and having the same uniform area of cro...

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  7. Water boils in an electric kettle in 15 min after being switched on . ...

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  8. An electric motor operating on a 50 V dc supply draws a current of 12...

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  9. A fuse with a circular cross - sectional radius of 0.15 mm blows at 1...

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  10. A motor operating on 120 V draws a current of 2 A . If the heat is dev...

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  11. The walls of a closed cubical box of edge 40 cm are made of a material...

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  12. Two tungsten lamps with resistances R(1) and R(2), respectively , are ...

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  13. n identical bulbs are connected in series and illuminated by a power s...

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  14. An electric motor is designed to work at 100 Vand draws a current of ...

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  15. A house is fitted with certain numbers of 100 W, 230 V incandescent la...

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  16. A house is fitted with seven tubelights of rating 220 V, 40 W each , t...

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  17. Two bulbs are marked 200 V, 300 W and 200 V, 600 W, respectively. The ...

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  18. A servo voltage stabiliser restricts the voltage output to 220 V +- 1%...

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  19. The efficiency of a cell when connected to a resistance R is 60 %. Wha...

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  20. A 25 W, 220 V bulb and a 100 W , 220 V bulb are connected in series ac...

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