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Electrical Energy and Power for GUJCET: 13 solved questions

Real GUJCET paper questions on electrical energy and power, part of current electricity. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2008 to 2026. No sign-in needed to read them.

What this topic asks

• Heating and power in resistors — 5 questions
• Rated bulbs and appliances — 5 questions
• Maximum power transfer — 3 questions

All 13 questions with solutions

• The ratio of cross-sectional areas of two conducting wires made up of the same material and having the same l… GUJCET 2008
• Two electric bulbs are connected, one at a time, across a potential difference V, and the powers consumed in… GUJCET 2008
• Two bulbs, each rated 250 V, 100 W, are first connected in series and then in parallel with a supply of 250 V… GUJCET 2009
• The maximum power dissipated in an external resistance R, when connected to a cell of emf E and internal resi… GUJCET 2011
• Four identical resistors connected in series with a battery together dissipate 20 W of power. What will be th… GUJCET 2013
• A given quantity of water is boiled by an electric heater in 5 min. If the supply voltage of the heater is re… GUJCET 2016
• The heat produced per unit time, on passing electric current through a conductor at a given temperature, is d… GUJCET 2019
• The emf of a car battery is 12 V and the internal resistance of the battery is 0.4 Ω. The maximum power drawn… GUJCET 2020
• A bulb of 100 W rating is connected with a 220 V supply. The resistance of the bulb is _. GUJCET 2020
• A light bulb is rated at 200 W for a 220 V supply. Find the resistance of the bulb. GUJCET 2022
• The emf of a storage battery of a car is 6.0 V. If internal resistance of the battery is 0.2 Ω, then maximum… GUJCET 2026
• In the following circuit, the heat evolved in the 10 Ω resistor is 10 cal s⁻¹. The heat evolved in the 4 Ω re… RS Academy GUJCET booklet
• Two bulbs of 220 V and 100 W are first connected in series and then in parallel with a supply of 220 V. Total… RS Academy GUJCET booklet