JAMB Physics · Electricity, magnetism and fields
Electrical energy and power: JAMB Physics Past Questions and Answers
What the JAMB syllabus covers in Electrical energy and power
Our summary: Electrical energy and power, the heating effect of current, power lines, house wiring and fuses.
- Concepts of electrical energy and power
- Commercial unit of electric energy and power
- Electric power transmission
- Heating effects of electric current
- Electrical wiring of houses
- Use of fuses
Objectives
- apply the expressions of electrical energy and power to solve problems;
- analyse how power is transmitted from the power station to the consumer;
- identify the heating effects of current and its uses;
- identify the advantages of parallel arrangement over series;
- determine the fuse rating.
Syllabus content © The Joint Admissions and Matriculation Board (UTME).
JAMB Physics questions on Electrical energy and power
- JAMB 2025How long will it take to heat 4 kg of water from 30ºC to 65ºC using an electric kettle taking 5 A from a 240 V supply? (Specific heat capacity of water = 4200 J…
- JAMB 2025A 500W electric oven plugged into a 220 V source will consume an electric current of
- JAMB 2025A refrigerator uses 150W. If it is kept on for 336 hours nonstop. What is the energy consumed in Kwh?
- JAMB 20245 X 10 ^ -3 kg of liquid at its boiling point is evaporated in 20s by the heat generated by a resistor of 2 when a current of 10A is used. The specific latent…
- JAMB 2024A particular household utilizes three electrical appliances for six hours daily if the appliances are rated 80W, 100W, and 120W respectively. Calculate the…
- JAMB 2024A refrigerator uses 150W. If it is kept on for 336 hours non-stop, what is the energy consumed in KWh?
- JAMB 2024Which of the following measuring instruments operates based on the heating effect of electric current?
- JAMB 2022A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?
- JAMB 2020What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?
- JAMB 2020Which of the following can be described as high tension transmission?
- JAMB 2019Lamps in domestic lightings are usually in
- JAMB 2018A 40W instrument has a resistance 90 Ohms. On what voltage should it be operated normally
- JAMB 2018Which of the following is an essential physical property of the wires uses for making fuses ?
- JAMB 2018The resistance of a 40W car head lamp, drawing current from a 12V battery is … .
- JAMB 2018Electrical power is transmitted at a high voltage rather than a low voltage because the amount of energy loss is due to
- JAMB 2018Electrical appliances in homes are normally earthed so that
- JAMB 2018A resistor connected to a 12V battery draws a current of 2A. The energy dispatched in the resistor in 5 minutes is … .
- JAMB 2018An electric heating coil rated at 1Kw is used to heat 2kg of water for 2 minutes. The initial water temperature is 30 ^o C. Taking the specific heat of the…
- JAMB 2014PHCN measures its electrical energy in
- JAMB 2014The maximum power transfer occur in a cell when the external resistance is
- JAMB 2013A house has ten 40W and five 100W bulbs. How much will it cost the owner of the house to keep them lit for 10 hours if the cost of a unit is 5N?
- JAMB 2013An electric device is rated 2000W, 250V. Calculate the maximum current it can take
- JAMB 2012The fuse in an electric device is always connected to the
- JAMB 2011If the charge of electricity is K wh is N4, what is the cost of operating an electrical appliance rated 250 v,2 A for six hours?
- JAMB 2011In Homes, electrical appliances and lamps are connected in parallel because
Years with Electrical energy and power questions in DeeepSolve's question bank
From the past questions DeeepSolve holds, not a count of everything the exam body has set.
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