|
In the circuit given below, Boojho observed that copper is deposited on the electrode
|
|
0
|
2974
|
March 22, 2018
|
|
Paheli had heard that rain water is as good as distilled water
|
|
0
|
4120
|
March 22, 2018
|
|
The bulb does not glow in the setup shown in figure given alongside
|
|
0
|
646
|
March 22, 2018
|
|
Name three liquids, which when tested in the manner shown in figure given alongside, may cause the magnetic needle to deflect
|
|
0
|
1301
|
March 22, 2018
|
|
When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?
|
|
0
|
716
|
March 22, 2018
|
|
Observe the following circuits carefully. In which circuit will the bulb glow?
|
|
0
|
1775
|
March 22, 2018
|
|
Why is tin electroplated on iron to make cans used for storing food?
|
|
0
|
1925
|
March 22, 2018
|
|
Paheli wants to deposit silver on an iron spoon
|
|
0
|
7665
|
March 22, 2018
|
|
Paheli set up an experiment using liquid A in the beaker as shown in figure below
|
|
0
|
4987
|
March 22, 2018
|
|
What precautions would you take if lightning occurs while you are outside the house?
|
|
0
|
1131
|
March 22, 2018
|
|
Explain why a charged halloon is repelled by another charged balloon whereas an uncharged balloon is attracted by another charged balloon
|
|
0
|
578
|
March 22, 2018
|
|
What should you do during an earthquake?
|
|
0
|
611
|
March 22, 2018
|
|
Explain how lightning takes place
|
|
0
|
1839
|
March 22, 2018
|
|
The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain
|
|
0
|
1267
|
March 22, 2018
|
|
Explain why it is safer to use a wireless telephone instead of a landline telephone during lightning
|
|
0
|
2730
|
March 22, 2018
|
|
Suggest three measures to protect ourselves from lightning.?
|
|
0
|
636
|
March 22, 2018
|
|
Name the scale on which the destructive energy of an earthquake is measured
|
|
0
|
3655
|
March 22, 2018
|
|
Explain why a charged body loses its charge if we touch it with our hand
|
|
0
|
6582
|
March 22, 2018
|
|
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain
|
|
0
|
1420
|
March 22, 2018
|
|
The strips of an electroscope diverge when a charged body is brought in contact with the metal clip. Now the clip is touched gently by our hand. What will happen to the strips? Explain
|
|
0
|
3037
|
March 22, 2018
|
|
Negatively charged body is brought in contact with the metal clip, the strips of the electroscope diverge
|
|
0
|
2153
|
March 22, 2018
|
|
Explain how does lightning conductor protects a building from getting struck by lightning
|
|
0
|
877
|
March 22, 2018
|
|
You might have observed on a dry day that when you touch the screen of a television or computer monitor (with picture tube), you get a slight shock. Why does it happen?
|
|
0
|
3542
|
March 22, 2018
|
|
If the materials used for constructing a building were good conductors
|
|
0
|
627
|
March 22, 2018
|
|
Identify the lightning conductor and the copper plate in the figure given below
|
|
0
|
1888
|
March 22, 2018
|
|
If air and cloud were good conductors of electricity, do you think lightning could occur?
|
|
0
|
3826
|
March 22, 2018
|
|
During the construction of a building the lightning conductor was left hanging in the air by mistake. Would the lightning conductor be still effective? Explain
|
|
0
|
2029
|
March 22, 2018
|
|
Find out the position of the image of an object situated at A in the plane mirror
|
|
0
|
1292
|
March 22, 2018
|
|
Explain how you can take care of your eyes
|
|
0
|
19993
|
March 22, 2018
|
|
Draw a labelled sketch of the human eye
|
|
0
|
3748
|
March 22, 2018
|