KVPY Stream-SA (Class 11) Physics: Questions 134 - 137 of 242
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Question number: 134
Question number: 135
Appeared in Year: 2015
A light bulb of resistance R = 16 Ω is attached in series with an infinite resistor network with identical resistances r as shown below. A 10 V battery drives current in the circuit. What should be
the value of r such that the bulb dissipates about 1 W of power?
Question number: 136
An ice ball falls from a height h and melts completely. Assuming that only one-fifth of the heat generated is absorbed by the ice, calculate the value of h.
(Latent heat of fusion of ice = 3.4⨯105 JKg-1 and g = 10 Nkg-1)