Question 1: Define an electric field and describe how it influences a charged particle.

Answer: An electric field is a region around a charged object where other charges experience a force; it influences a charged particle by exerting force on it depending on the charge and the field's strength.

Question 2: Explain the mechanism by which static electricity can generate an electric field.

Answer: Static electricity generates an electric field when charges are transferred or separated on objects, creating a region of electric influence around the charged object.

Question 1: Calculate the magnitude of the electric field at a point 0.05 meters away from a charge of 2 microcoulombs. Use Coulomb's law: E = k * |Q| / r^2, where k = 9 × 10^9 N·m^2/C^2.

Answer: E = (9 × 10^9) * (2 × 10^-6) / (0.05)^2 = 7.2 × 10^5 N/C

Question 2: A charge of 5 microcoulombs is placed 0.1 meters from a point where the electric field strength is 3 × 10^5 N/C. What is the value of the charge at that point? (Use E = k * |Q| / r^2).

Answer: |Q| = (E * r^2) / k = (3 × 10^5) * (0.1)^2 / (9 × 10^9) = 3.33 × 10^-6 C = 3.33 microcoulombs

Question 1: List three safety precautions that should be taken when conducting experiments involving static electricity.

Answer: Ensure proper grounding to prevent static buildup, avoid using flammable materials nearby, and wear insulating gloves or conduct experiments on an isolated surface.

Question 2: Describe a simple experiment to demonstrate the presence of an electric field around a charged object.

Answer: Use a lightweight, neutral object such as a small piece of paper or a leaf. Bring a charged balloon or glass rod near it without contact. Observe the movement of the object towards or away from the charged object, indicating the influence of an electric field.

Question 1: A charged sphere of 10 microcoulombs creates an electric field of 1.8 × 10^5 N/C at a distance of 0.2 meters. Determine if this data is consistent with Coulomb's law. Show your calculations.

Answer: Using Coulomb's law: E = k * Q / r^2. Calculate expected E: (9 × 10^9) * (10 × 10^-6) / (0.2)^2 = 2.25 × 10^5 N/C. Since the given E is 1.8 × 10^5 N/C, the data is reasonably consistent, considering experimental uncertainties.

Question 1: Explain how electric fields are utilized in the technology of photocopiers or laser printers.

Answer: Electric fields are used to manipulate toner particles, attracting them to specific areas of the paper based on the electric charge pattern, allowing the creation of images and text.

Question 2: Describe how understanding electric fields can help improve safety measures in industries handling static electricity, such as in oil refineries or chemical plants.

Answer: Understanding electric fields allows industries to identify static charge buildup points, implement grounding and dissipation techniques, and prevent static discharge sparks that could cause fires or explosions, thereby enhancing safety.