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प्रश्न
You are provided with a magnetic compass, an empty matchbox, a battery of two cells and connecting wires. Using these objects, how will you make a tester for testing an electric circuit? Draw the necessary circuit diagram and explain.
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उत्तर
Whenever current flows through the circuit the magnetic compass needle shows deflection due to magnetic effect of current.
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संबंधित प्रश्न
The passage of an electric current through a solution causes ______ effects.
Name three liquids, which when tested in the manner shown in Figure, may cause the magnetic needle to deflect.
Prepare a list of objects around you that are electroplated.
An electric current can produce
Electroplating of ______ is done on objects like water taps and cycle bell to give them a shiny appearance.
Paheli set up an experiment using liquid A in the beaker as shown in the following figure. She observed that the bulb glows. Then she replaced the liquid A by another liquid B. This time the bulb did not glow. Boojho suggested replacing the bulb by an LED. They observed that the LED glows. Explain.
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.
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(a) |
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______ |
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(b) |
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______ |
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(c) |
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______ |
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(d) |
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______ |
Explain the following:
Short circuit.
Name the process which shows the chemical effect of electric current?
State some advantages of electroplating.
