The lamp has an efficiency of 20%. Explain what this means.

20% efficiency means that 20% of the electrical energy going into the lamp is transfered to light, and 80% of the energy is lost/wasted.

BP
Answered by Bryce P. Physics tutor

13690 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

What led to the Plum Pudding model being replaced by Rutherford's nuclear model of the atom? (6 marks)


Explain why the moon is not pulled away from the Earth by the Sun.


A kettle boils 0.6kg of water. After some time the temperature of the water has decreased to 83 degrees. The specific heat capacity of water is 4200J/kg. Calculate the energy transferred to the surroundings.


What is a chain reaction?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences