DC FUNDAMENTALS MCQs 20 min Score: 0 Attempted: 0/20 Subscribe 1. The ______ law states that potential difference is directly proportional to current (A) Coulomb’s (B) Ohm's (C) Kirchhoff's voltage (D) Lenz's 2. According to Ohm's law (A) Q = CV (B) R = ρL/A (C) V = IR (D) B = Ø/A 3. According to Ohm's law, with the increase in potential difference current (A) decreases (B) increases (C) remains constant (D) fluctuates 4. When current flows through a circuit having 20Ω resistance and 100V voltage, current is (A) 4A (B) 7A (C) 5A (D) 12A 5. The resistance is directly proportional to the ______ of the conductor (A) width (B) breadth (C) thickness (D) length 6. Resistance is ______ proportional to the cross sectional area of conductor (A) directly (B) not (C) inversely (D) any of above 7. The resistance of a conductor depends on the ______ (A) friction (B) temperature (C) colour (D) collision 8. The Greek letter "Rho" denotes ______ (A) resistivity (B) conductivity (C) malleability (D) permeability 9. Conductors ______ current to flow easily (A) allows (B) stop (C) block (D) conduct 10. Conductors have ______ number of electrons in their structure (A) large (B) random (C) small (D) swift 11. The ability to conduct is ______ (A) conductivity (B) electricity (C) resistivity (D) all of above 12. The opposition offered to free electrons is ______ (A) resistance (B) current (C) torque (D) conductance 13. Resistance adds up in ______ (A) series (B) parallel (C) series parallel (D) any of above 14. P.D stands for ______ (A) power display (B) potential difference (C) power driven (D) proportional difference 15. In series circuit of resistances, the voltage ______ in each resistor (A) increases (B) decreases (C) drops (D) constant 16. Current remains ______ in series circuits (A) increasing (B) constant (C) decreasing (D) oscillating 17. Voltage remains ______ in parallel circuits (A) increasing (B) decreasing (C) constant (D) divides 18. Current ______ in parallel circuit of resistances (A) increases (B) divides (C) decreases (D) constant 19. The rate of doing work is called ______ (A) energy (B) joule (C) power (D) voltage 20. The relationship for power is P = ______ (A) C×V (B) VI (C) IR (D) Q/t