|
Distinguish between the following. Cell and Battery ,An Open Switch and A Close Switch
|
|
0
|
4533
|
March 23, 2018
|
|
With the help of an activity explain the making of an electromagnet
|
|
0
|
2051
|
March 23, 2018
|
|
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
|
|
0
|
2411
|
March 23, 2018
|
|
In the circuit shown below
|
|
0
|
687
|
March 23, 2018
|
|
Describe a simple experiment to show that the bulb lights up when an electric circuit is complete and vice-versa
|
|
0
|
2792
|
March 23, 2018
|
|
How does the magnetic effect of electric current help in the working of an electric bell? Explain with the help of a diagram
|
|
0
|
7163
|
March 23, 2018
|
|
Paheli took a wire of length 10 cm. Boojho took a wire of 5 cm of the same material and thickness
|
|
0
|
7405
|
March 23, 2018
|
|
When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain
|
|
0
|
4549
|
March 23, 2018
|
|
How do short circuits occur?
|
|
0
|
572
|
March 23, 2018
|
|
Write four uses of electromagnets
|
|
0
|
640
|
March 23, 2018
|
|
On what factors does the strength of an electromagnet depend?
|
|
0
|
2171
|
March 23, 2018
|
|
On what factors does the heat produced in a wire depend?
|
|
0
|
5448
|
March 23, 2018
|
|
What are electric fuses? Why are they important?
|
|
0
|
1208
|
March 23, 2018
|
|
Will the compass needle show deflection when the switch in the circuit shown by figure given below is closed?
|
|
0
|
1499
|
March 23, 2018
|
|
Name any two effects of electric current
|
|
0
|
756
|
March 23, 2018
|
|
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
|
|
0
|
2305
|
March 23, 2018
|
|
Draw the circuit diagram to represent the circuit shown below
|
|
0
|
3438
|
March 23, 2018
|
|
Draw in your notebook the symbols to represent the following components of electrical
|
|
0
|
10587
|
March 23, 2018
|
|
Boojho made an electromagnet by winding 50 turns of wire over an iron screw
|
|
0
|
3816
|
March 23, 2018
|
|
Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?
|
|
0
|
1614
|
March 23, 2018
|
|
Name two electric devices for each where heating effect of current is used and magnetic effect of current is used
|
|
0
|
5188
|
March 23, 2018
|
|
Can we use the same fuse in a geyser and a television set? Explain
|
|
0
|
1944
|
March 23, 2018
|