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प्रश्न
Can we use the same fuse in a geyser and a television set? Explain.
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उत्तर
No, a geyser and a television set require different amounts of current to operate
Name two electric devices for each where
- the heating effect of current is used
- the magnetic effect of current is used
Maim Heating effect – Geyser, room heater.
Magnetic effect – Electric bell, Cranes to lift magnetic material.
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संबंधित प्रश्न
What is nichrome? State its one use.
How much heat will an instrument of 12 W produce in one minute if it is connected to the heat produced by it?
Which electric heating device in your home do you think have resistors which control the flow of electricity?
Give a scientific reason:
For electric power transmission, copper or aluminium wire is used.
Give Scientific reason.
In practice, the unit kWh is used for the measurement of electrical energy, rather than joule.
Write the mathematical expression for Joule’s law of heating.
How can overloading be avoided?
Which of the following gases are filled in electric bulbs?
Two students decided to investigate the effect of water and air on iron object under identical experimental conditions. They measured the mass of each object before placing it partially immersed in 10 ml of water. After a few days, the object were removed, dried and their masses were measured. The table shows their results.
| Student | Object | Mass of Object before Rusting in g |
Mass of the coated object in g |
| A | Nail | 3.0 | 3.15 |
| B | Thin plate | 6.0 | 6.33 |
What might be the reason for the varied observations of the two students?
What is the heating effect of electric current?
