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Of the two bulbs in a house, one glows brighter than the other. Which of the two has a larger resistance?a) the dim bulbb) the bright bulbc) both have the same resistanced) the brightness doesn't depend on the resistance Give a detailed reason for your choice. |
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Answer» (B) THE BRIGHT BULB WILL HAVE MORE RESISTANCE THAN DIM BULB. because According to P = I²R, if the currents are the same, the bulb with the larger R will have the larger power P. And u know power is dissipated as heat (i²r) which GIVES glowing EFFECT. |
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