|
What precautions would you take if lightning occurs while you are outside the house?
|
|
0
|
1124
|
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
|
573
|
March 22, 2018
|
|
What should you do during an earthquake?
|
|
0
|
609
|
March 22, 2018
|
|
Explain how lightning takes place
|
|
0
|
1838
|
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
|
1265
|
March 22, 2018
|
|
Explain why it is safer to use a wireless telephone instead of a landline telephone during lightning
|
|
0
|
2727
|
March 22, 2018
|
|
Suggest three measures to protect ourselves from lightning.?
|
|
0
|
633
|
March 22, 2018
|
|
Name the scale on which the destructive energy of an earthquake is measured
|
|
0
|
3652
|
March 22, 2018
|
|
Explain why a charged body loses its charge if we touch it with our hand
|
|
0
|
6574
|
March 22, 2018
|
|
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain
|
|
0
|
1414
|
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
|
3033
|
March 22, 2018
|
|
Negatively charged body is brought in contact with the metal clip, the strips of the electroscope diverge
|
|
0
|
2148
|
March 22, 2018
|
|
Explain how does lightning conductor protects a building from getting struck by lightning
|
|
0
|
872
|
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
|
3540
|
March 22, 2018
|
|
If the materials used for constructing a building were good conductors
|
|
0
|
624
|
March 22, 2018
|
|
Identify the lightning conductor and the copper plate in the figure given below
|
|
0
|
1882
|
March 22, 2018
|
|
If air and cloud were good conductors of electricity, do you think lightning could occur?
|
|
0
|
3821
|
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
|
2027
|
March 22, 2018
|
|
(a) Name the agency responsible for making quake proof houses?
|
|
0
|
2503
|
September 16, 2017
|
|
(a) Why do dry hair stand on when combed with a plastic comb?
|
|
0
|
2352
|
September 16, 2017
|
|
Name the device used to secure tall buildings from lightning. Explain
|
|
0
|
2100
|
September 16, 2017
|
|
If your friend is struck by lightning, how will you help him?
|
|
0
|
1052
|
September 16, 2017
|
|
During a thunderstorm, which places are unsafe if you are outside?
|
|
0
|
681
|
September 16, 2017
|
|
During a thunderstorm which places are safe?
|
|
0
|
710
|
September 16, 2017
|
|
What steps should be taken to protect yourself in case of an earthquake
|
|
0
|
642
|
September 16, 2017
|
|
Describe with the help of a diagram an instrument which can be used to detect
|
|
0
|
6788
|
September 16, 2017
|
|
Suppose you are outside your home and an earthquake strikes
|
|
0
|
5160
|
September 16, 2017
|
|
Is it true that a charged object always attracts an uncharged object
|
|
0
|
888
|
September 16, 2017
|
|
(a) What will you observe in Figure-I?
|
|
0
|
1491
|
September 16, 2017
|
|
Why the gold leaves in an electroscope
|
|
0
|
1742
|
September 16, 2017
|