- What is electric charge?
A. A form of energy
B. A property of matter that causes electric force
C. The speed of electrons
D. The mass of a proton
- The SI unit of electric charge is:
A. Newton
B. Joule
C. Coulomb
D. Volt
- Which symbol is commonly used for electric charge?
A. F
B. q
C. E
D. V
- How many types of electric charges are there?
A. One
B. Two
C. Three
D. Four
- The two types of electric charges are:
A. North and south
B. Hot and cold
C. Positive and negative
D. Heavy and light
- Like charges:
A. Attract each other
B. Repel each other
C. Cancel each other completely
D. Have no effect on each other
- Unlike charges:
A. Repel each other
B. Attract each other
C. Always remain neutral
D. Move in circles
- Which particle has a positive charge?
A. Electron
B. Neutron
C. Proton
D. Photon
- Which particle has a negative charge?
A. Proton
B. Electron
C. Neutron
D. Atom
- Which particle has no electric charge?
A. Proton
B. Electron
C. Neutron
D. Ion
- The charge on one electron is approximately:
A. +1.6 × 10⁻¹⁹ C
B. -1.6 × 10⁻¹⁹ C
C. +9.8 C
D. -9.8 C
- The charge on one proton is approximately:
A. +1.6 × 10⁻¹⁹ C
B. -1.6 × 10⁻¹⁹ C
C. 0 C
D. +1 C
- Coulomb’s Law gives the force between:
A. Two masses
B. Two moving cars
C. Two electric charges
D. Two magnets only
- The mathematical form of Coulomb’s Law is:
A. F = ma
B. F = kq₁q₂/r²
C. V = IR
D. P = IV
- In Coulomb’s Law, F represents:
A. Frequency
B. Electric force
C. Electric field
D. Friction
- In Coulomb’s Law, r represents:
A. Radius of charge
B. Resistance
C. Distance between charges
D. Rate of charge flow
- The value of Coulomb’s constant k is approximately:
A. 9 × 10⁹ N·m²/C²
B. 6.67 × 10⁻¹¹ N·m²/kg²
C. 3 × 10⁸ m/s
D. 1.6 × 10⁻¹⁹ C
- Coulomb’s force is directly proportional to:
A. The distance between charges
B. The product of the charges
C. The square of the distance
D. The mass of the charges
- Coulomb’s force is inversely proportional to:
A. Distance
B. Square of distance
C. Product of masses
D. Sum of charges
- if the distance between two charges is doubled, the force becomes:
A. Double
B. Four times
C. One-half
D. One-fourth
- If the distance between two charges is reduced to half, the force becomes:
A. One-fourth
B. One-half
C. Two times
D. Four times
- If one charge is doubled while the distance remains the same, the force becomes:
A. Half
B. Double
C. Four times
D. Zero
- If both charges are doubled, the force becomes:
A. Two times
B. Four times
C. Half
D. One-fourth
- Coulomb’s Law is most similar in form to:
A. Ohm’s Law
B. Newton’s Law of Gravitation
C. Hooke’s Law
D. Law of Reflection
- The electric force between two charges acts along:
A. A curved path
B. The line joining the two charges
C. A circular path
D. A random direction
- When an object gains electrons, it becomes:
A. Positively charged
B. Negatively charged
C. Neutral
D. Magnetized only
- When an object loses electrons, it becomes:
A. Negatively charged
B. Positively charged
C. Neutral
D. Heavier
- A neutral object has:
A. More protons than electrons
B. More electrons than protons
C. Equal positive and negative charges
D. No atoms
- Coulomb’s Law applies mainly to:
A. Point charges
B. Very large planets only
C. Sound waves
D. Heat transfer
- Which of the following is an application of Coulomb’s Law?
A. Explaining attraction between charged objects
B. Calculating speed of sound
C. Measuring temperature
D. Finding water pressure
