Lakhmir Singh & Manjit Kaur Solutions for Chapter: Energy, Exercise 4: EXERCISES
Lakhmir Singh & Manjit Kaur Physics Solutions for Exercise - Lakhmir Singh & Manjit Kaur Solutions for Chapter: Energy, Exercise 4: EXERCISES
Attempt the free practice questions on Chapter 3: Energy, Exercise 4: EXERCISES with hints and solutions to strengthen your understanding. Lakhmir Singh's Science Physics solutions are prepared by Experienced Embibe Experts.
Questions from Lakhmir Singh & Manjit Kaur Solutions for Chapter: Energy, Exercise 4: EXERCISES with Hints & Solutions
A generator converts _____ energy into electrical energy.
Differentiate between the following.
Light energy and heat energy.
Differentiate between the following.
Gravitational potential energy and elastic potential energy.
What is mechanical energy? Give two examples.
Write the uses of heat energy.
Make your own telephone. Take two plastic mugs and a metre-long, strong thread. At the bottom of each mug, make two tiny holes. Pass the thread through one hole and secure it firmly with a knot. Similarly, pass the other end of the thread through the hole in the second mug and fasten firmly. Hold one mug and give the other to your friend. Ask him to move as far away from you as the thread will allow. The thread should be stretched tight between the two of you. Speak into the mug and let your friend hear you at the other end. At the end of the conversation, you can call 'over and out'.
Sound vibration travels along the length of the wire or thread and reach your friend. A loose wire is not effective in carrying sound as a taut wire.
Rub your palms together for some time. You will feel warm. You do this in winter to warm up your cold hands. Why?
List five examples of conversion of energy from one form into the other, which you find around you in daily life.
