Electrostatics Quiz

Choose the correct option. i. A positively charged glass rod is brought close to a metallic rod isolated from ground. The charge on the side of the metallic rod away from the glass rod will be (A) same as that on the glass rod and equal in quantity (B) opposite to that on the glass of and equal in quantity (C) same as that on the glass rod but lesser in quantity (D) same as that on the glass rod but more in quantity ii. An electron is placed between two parallel plates connected to a battery. If the battery is switched on, the electron will (A) be attracted to the +ve plate (B) be attracted to the -ve plate (C) remain stationary (D) will move parallel to the plates iii. A charge of + 7 µC is placed at the centre of two concentric spheres with radius 2.0 cm and 4.0 cm respectively. The ratio of the flux through them will be

Study Notes

Properties of Electric Charges

Electric charges can be positive or negative
Like charges repel and unlike charges attract
Charges can be transferred from one object to another
The SI unit of charge is the coulomb (C)
The charge on an electron is -1.6 x 10^-19 C
The charge on a proton is +1.6 x 10^-19 C

Electrostatics

Electrostatics is the study of stationary electric charges and their interactions

Insulator

An insulator is a material that resists the flow of electric current
Example of insulator: Rubber

Law of Conservation of Charge

The total charge in an isolated system remains constant
Charges can be transferred from one object to another, but the total amount of charge remains the same

Multiple Choice Questions

**Question 1: ** The correct option is (B) opposite to that on the glass of and equal in quantity
- When a positively charged glass rod is brought close to a metallic rod, the electrons in the metal will be attracted to the glass rod
- This will cause the side of the metallic rod closest to the glass rod to become negatively charged, while the side of the metallic rod farthest from the glass rod will become positively charged
**Question 2: ** The correct option is (A) be attracted to the +ve plate
- When the battery is switched on, an electric field is created between the plates
- Electrons are negatively charged and will be attracted to the positive plate
**Question 3: ** The correct option is 1:1
- The electric flux through a closed surface is proportional to the enclosed charge
- Since the charge is at the center of both spheres, the amount of charge enclosed by each sphere is the same
- Therefore, the ratio of the flux through the two spheres will be 1:1

Description

Test your knowledge of electrostatics with this quiz! Explore various properties of electric charges, identify the SI unit of electric charge, and distinguish between conductors and insulators. Perfect for class 11 students studying electrostatics.