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प्रश्न
Observe the following circuits carefully. In which circuit will the bulb glow? Write Yes or No in the blank space provided along each of the circuit given in the figure.
|
(a) |
|
______ |
|
(b) |
|
______ |
|
(c) |
|
______ |
|
(d) |
|
______ |
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उत्तर
|
(a) |
|
No |
|
(b) |
|
Yes |
|
(c) |
|
No |
|
(d) |
|
Yes |
Explanation:
- Because piece of coal is a poor conductor of electricity.
- Because iron nail is a good conductor of electricity.
- Because eraser is a poor conductor of electricity.
- Because steel spoon is a good conductor of electricity.
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संबंधित प्रश्न
The process that you saw in the image is used for the purification of copper. A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of the battery and why?
Boojho and Paheli performed experiments taking similar bulbs and cells but two different solutions A and B as shown in the following figure.
 |
 |
| Boojho's Experiment | Paheli's Experiment |
| (A) | (B) |
They found that the bulb in the setup A glows more brightly as compared to that of the setup B. You would conclude that
When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates
Which of the following metals is used in electroplating to make objects appear shining?
Electroplating of ______ is done on objects like water taps and cycle bell to give them a shiny appearance.
Explain the following:
Short circuit.
The most common industrial application of chemical effects of electric current is ______.
______ is used in the extraction and purification of metals.
Match the following
| 1. | Anode | a. | Conducting solution |
| 2. | Cathode | b. | Positive terminal |
| 3. | Ions | c. | Negative terminal |
| 4. | Electrolyte | d. | Positively or negatively charged |
State some advantages of electroplating.
