Question 1: As per convention, what is the charge on a glass rod when it is rubbed with silk cloth?
Answer: (a) Positive
Question 2: As per convention, what is the charge on silk cloth when a glass rod is rubbed with silk cloth?
Answer: (b) Negative
Question 3: Transfer of which atomic particle produces charge in a body?
Answer: (c) Electron
Question 4: Which state was hit by a powerful earthquake on 26th January 2001?
Answer: (d) Gujarat
Question 5: A major tsunami occurred on 26th December 2004 in which ocean?
Answer: (a) Indian Ocean
Question 1: What is lightning?
Answer: The transfer of charge from clouds to the earth or from cloud to cloud is called lightning.
Question 2: What is electroscope?
Answer: Electroscope is a simple device which is used to test the presence of charge in an object.
Question 3: What do you understand by charging?
Answer: Acquiring a charge is called charging.
Question 4: What do you understand by discharging?
Answer: Losing the charge is called discharging.
Question 5: What is earthing?
Answer: Transfer of charge from a charged body to earth is called earthing.
Question 6: What is a lightning conductor?
Answer: This is a simple device which protects a building from being hit by lightning.
Question 7: What is an earthquake?
Answer: Sudden shaking of the earth; which lasts for a very short duration is called earthquake.
Question 8: What is tectonic plate?
Answer: The crust of the earth is composed of several pieces of landmass. These are called tectonic plates.
Question 9: What are seismic zones?
Answer: The boundaries of the tectonic plates are at high risk of earthquake. These boundaries are called seismic zones or fault zones.
Question 10: What is Richter scale?
Answer: This is a logarithmic scale which shows the intensity of an earthquake.
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