- What is the charge acquired by a glass rod when rubbed with silk?
(a) Negative
(b) Positive
(c) Neutral
(d) It depends on the silk.
- What is an electroscope used for?
(a) Measuring electric current
(b) Detecting charged objects
(c) Generating static electricity
(d) Storing electrical energy
- What is the process of transferring charge from a charged object to the earth called?
(a) Charging
(b) Discharging
(c) Earthing
(d) Conduction
- What is a lightning conductor used for?
(a) Attracting lightning
(b) Protecting buildings from lightning
(c) Generating electricity from lightning
(d) Predicting lightning strikes
- What is an earthquake?
(a) A slow movement of the earth’s crust
(b) A sudden shaking or trembling of the earth
(c) A volcanic eruption
(d) A tsunami
Section C: True or False
- Like charges attract each other.
- A charged balloon attracts an uncharged balloon.
- Earthing helps prevent electrical shocks.
- Lightning can strike through telephone cords.
- Open fields are the safest place during a thunderstorm.
Section D: Short Answer Questions
- Define an earthquake.
- What is a lightning conductor?
- List two safety precautions during a thunderstorm.
- What is earthing?
- Why do charged balloons repel each other?
Section E: Long Answer Questions
- Explain the process of lightning and how it occurs.
- Describe the construction and working of a simple electroscope.
- What are the safety measures one should take during an earthquake?
- How do plate movements cause earthquakes?
- Describe the role of lightning conductors in protecting buildings.
