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A battery lights a bulb. Describe the energy changes involved in the process. - Physics Cbse class 11 1 AnswerA torch bulb is rated 2.5 V and 750 mA. Calculate (i) its power, (ii) its resistance and (iii) the energy consumed if this bulb is lighted for 4 hours. -2005 CBSE Physic class 101 AnswerHow much energy is given to each coulomb of charge passing through a 6 V battery? -CBSE Physics 1 AnswerAn electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb? -CBSE Physics 1 AnswerCompare the power used in the 2 Ω resistor in each of the following circuits: (i) a 6 V battery in series with 1 Ω and 2 Ω resistors, and (ii) a 4 V battery in parallel with 12 Ω and 2 Ω resistors. -CBSE Physics 1 Answer The supply voltage to a room is 120 V. The resistance of the lead wires is 6Ω. A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb ? - physics 20131 AnswerIn a drying experiment, the constant rate of drying is found to be 3.6 kg water m^-2h^-1. Dry bulb and wet bulb temperatures of the drying air are 75C and 37C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures 1 Answer When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to . cbse-class8-physics-20151 AnswerName the process of large energy production in the Sun. -2006 CBSE Physic class 101 AnswerThe process that you saw in Activity 14.7 is used for purification of copper. A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of the battery and why? cbse-class8-physics-20151 AnswerDescribe the various steps involved in conducting a scientific enquiry. cbse-11-psychology-20151 AnswerWhich has a higher resistance : a 50 W lamp bulb or a 25 W lamp bulb and how many times ? -2005 CBSE Physic class 101 AnswerDescribe the process of transcription in bacteria cbse-Biology-class-121 Answer A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor. He reports that -CBSE physics class 101 Answer What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption? -CBSE Physics 1 Answer A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω , 0.5 Ω and 12 Ω, respectively. How much current would flow through the 12 Ω resistor -CBSE Physics 1 AnswerFill in the blanks. cbse-class8-physics-20151 AnswerWhich energy is converted into electrical energy by a solar cell ? 1 AnswerDescribe the roles of heat, primers and the bacterium Thermus aquaticus in the process of PCR. cbse-Biology-class-121 Answer When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor. -CBSE Physics 1 Answer