Question
State two properties of infrared radiations which differ from visible light.
✓
Answer
(i) The wavelength of infrared radiations is longer than that of visible light.
(ii) The infrared radiations have more heating effect than that of visible light.
(ii) The infrared radiations have more heating effect than that of visible light.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Establish the relation that heat produced in a metallic conductor due to the flow of current is $V^2t/R$ joules, where V is the potential difference across the ends of the conductor, R its resistance and t is the time in second for which current flows.
→State two conditions necessary for total internal reflection to occur.
Ice cream appears colder to the mouth than water at 0°C. Give a reason.
What is a machine?
(a) What are
(i) beta particles, (ii) gamma radiations?
(b) Explain briefly what changes take place within the nuclei, when beta particle is emitted by a radioactive substance.
(i) beta particles, (ii) gamma radiations?
(b) Explain briefly what changes take place within the nuclei, when beta particle is emitted by a radioactive substance.
What is the purpose of fuse in an electrical circuit?
A , B and C are three forces each of magnitude 5 N acting in the plane of paper as shown in the figure. Point O lies in the same plane.
Complete the table using the labels from the figure. The first label is done for you.
Complete the table using the labels from the figure. The first label is done for you.
| S.No. | Description | Label |
| (a) | The force having the greatest moment about O | A |
| (b) | The force having the least moment about O | |
| (c) | The forces producing clockwise moment | |
| (d) | The forces producing anticlockwise moment | |
| (e) | The forces producing anticlockwise moment O |
How does the (i) thickness and (ii) length of a fuse wire depend on its current rating
How does the wave pattern of a loud note differ from a soft note? Draw a diagram.
What is an electric motor? State its principle.