David Sang Solutions for Chapter: Energy Transformations and Energy Transfer, Exercise 3: Question

Author:David Sang

David Sang Physics Solutions for Exercise - David Sang Solutions for Chapter: Energy Transformations and Energy Transfer, Exercise 3: Question

Attempt the free practice questions on Chapter 6: Energy Transformations and Energy Transfer, Exercise 3: Question with hints and solutions to strengthen your understanding. Cambridge IGCSE® Physics Coursebook Second Edition solutions are prepared by Experienced Embibe Experts.

Questions from David Sang Solutions for Chapter: Energy Transformations and Energy Transfer, Exercise 3: Question with Hints & Solutions

EASY
Upper Secondary: IGCSE
IMPORTANT

What energy conversions are going? In case, write an equation to represent the conversion.

A hairdryer is connected to the mains electricity supply. It blows hot air at the user's wet hair. It whirrs as it does so.

EASY
Upper Secondary: IGCSE
IMPORTANT

A light bulb is supplied with 100J of energy every second.

How many joules of energy leave the bulb every second in the form of heat and light?

EASY
Upper Secondary: IGCSE
IMPORTANT

A light bulb is supplied with 100J of energy each second.

If 10J of energy leave the lamp each second in the form of light, how many joules leave each second in the form of heat?