Question
State Joule’s law about heating effect of electric current.
✓
Answer
Joule’s law about heating effect of electric current: The quantity of heat produced in a conductor when a current flows through it is directly proportional to (1) the square of the current (2) the resistance of the conductor (3) the time for which the current flows.
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
State any four characteristics of a good source of energy.
Which fuels are obtained from biomass?
Draw a neat labelled diagram. : Dispersion of light
Complete the given chart:
| Sr. No. | Body Constituents | Proteins/Amino Acids |
| 1. | Blood | __________________ |
| 2. | __________________ | Ossein |
| 3. | Skin | __________________ |
| 4. | __________________ | Insulin |
| 5. | Muscle | __________________ |
| 6. | __________________ | Various proteins of cell membrane |
Consider the following elements:
$_{20}Ca, _8O, _{18}Ar, _{16}S, _4Be, _2He.$
Which of the above elements would you expect to be:
→$_{20}Ca, _8O, _{18}Ar, _{16}S, _4Be, _2He.$
Which of the above elements would you expect to be:
- Very stable?
- In group $2$ of the periodic table?
- In group $16$ of the periodic table?
Write what the signs indicate:
At what distance from a concave mirror of focal length $10\ cm$ should an object $2\ cm$ long be placed in order to get an erect image $6\ cm$ tall?
→Alkane and Alkene.
Take three ring shaped magnets, insulated copper wire (1.5m) battery and paper clips. Cut the wire into three pieces. One piece should be about 1m long and the other two 0.25m long each. Take 1m piece of wire and wrap this wire around two fingers to form a coil. Take the loose end of this wire and wrap it once along the diameter of the coil. The two arms of the coil should be directly opposite each other. Bend the paper clip and prepare a holder for the coil. Pile the three magnets on the table. Place the coil above the magnet on the paper clip holder. Take free ends of the wire and connect them to the battery as shown in the figure 5.17. Give a single spin to the coil
(i) What do you observe?
(ii) What makes the coil rotate on passing the current?
(i) What do you observe?
(ii) What makes the coil rotate on passing the current?
Write the names of India's satellite series and launchers?