Sem 2 Physics

📘 Semester II Physics Review Guide: Flashcards + Quizzes

⚡️ Unit 1: Electric Forces & Fields

Flashcards

Q1: What particle is transferred to charge an object?
A1: Electrons

Q2: What charge does the nucleus of an atom have?
A2: Positive

Q3: What is polarization?
A3: Redistribution of charge in an object due to a nearby charged object

Q4: What type of force is the electric force?
A4: A field force (acts at a distance)

Q5: What does Coulomb's law state?
A5: Electric force is directly proportional to the product of charges and inversely proportional to the square of distance

Quiz (5 Qs)

1. Objects become charged by transferring:
A. Protons
B. Neutrons
C. Electrons ✅
D. Nuclei

2. Two negative charges will:
A. Attract
B. Repel ✅
C. Combine
D. Become neutral

3. The force between charges increases when distance:
A. Increases
B. Decreases ✅
C. Stays the same
D. Becomes zero

4. A negatively charged rod brought near a metal sphere causes:
A. No charge
B. Positive charge
C. Induced charge ✅
D. Electrons to stop

5. What is the unit of electric field strength?
A. N/C ✅
B. V/A
C. C/m
D. W/m

🔋 Unit 2: Electric Energy & Circuits

Flashcards

Q1: What is electric potential energy?
A1: Energy due to position in an electric field

Q2: What is electric current?
A2: The rate of flow of electric charge (measured in amperes)

Q3: What is Ohm’s Law?
A3: V = IR

Q4: In a series circuit, the current is:
A4: The same at all points

Q5: What is the unit of resistance?
A5: Ohms (Ω)

Quiz (5 Qs)

1. One ampere equals:
A. One joule/sec
B. One coulomb/sec ✅
C. One volt/sec
D. One ohm

2. A resistor in a circuit:
A. Speeds up electrons
B. Adds voltage
C. Converts energy into heat ✅
D. Acts like a switch

3. In a parallel circuit, the voltage:
A. Changes at each branch
B. Is zero
C. Is the same across all branches ✅
D. Increases in each resistor

4. A device that stores electric energy is called a:
A. Resistor
B. Capacitor ✅
C. Fuse
D. Load

5. A short circuit has:
A. Very high resistance
B. No energy transfer
C. Little resistance ✅
D. Many paths

🌈 Unit 3: Light, Reflection & Refraction

(Already in previous message; will continue building more units below.)