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Distinguish between the following. Cell and Battery ,An Open Switch and A Close Switch
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0
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4582
|
March 23, 2018
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With the help of an activity explain the making of an electromagnet
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0
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2060
|
March 23, 2018
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The bulb in the circuit shown in figure below does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow
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0
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2427
|
March 23, 2018
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In the circuit shown below
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0
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697
|
March 23, 2018
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Describe a simple experiment to show that the bulb lights up when an electric circuit is complete and vice-versa
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0
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2815
|
March 23, 2018
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How does the magnetic effect of electric current help in the working of an electric bell? Explain with the help of a diagram
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0
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7188
|
March 23, 2018
|
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Paheli took a wire of length 10 cm. Boojho took a wire of 5 cm of the same material and thickness
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0
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7445
|
March 23, 2018
|
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When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain
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0
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4551
|
March 23, 2018
|
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How do short circuits occur?
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0
|
577
|
March 23, 2018
|
|
Write four uses of electromagnets
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0
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644
|
March 23, 2018
|
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On what factors does the strength of an electromagnet depend?
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0
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2178
|
March 23, 2018
|
|
On what factors does the heat produced in a wire depend?
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0
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5451
|
March 23, 2018
|
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What are electric fuses? Why are they important?
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0
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1211
|
March 23, 2018
|
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Will the compass needle show deflection when the switch in the circuit shown by figure given below is closed?
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0
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1507
|
March 23, 2018
|
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Name any two effects of electric current
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0
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761
|
March 23, 2018
|
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The figure below shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells
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0
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2317
|
March 23, 2018
|
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Draw the circuit diagram to represent the circuit shown below
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0
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3455
|
March 23, 2018
|
|
Draw in your notebook the symbols to represent the following components of electrical
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0
|
10644
|
March 23, 2018
|
|
Boojho made an electromagnet by winding 50 turns of wire over an iron screw
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0
|
3821
|
March 23, 2018
|
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Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?
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0
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1617
|
March 23, 2018
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Name two electric devices for each where heating effect of current is used and magnetic effect of current is used
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0
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5195
|
March 23, 2018
|
|
Can we use the same fuse in a geyser and a television set? Explain
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0
|
1950
|
March 23, 2018
|