Quiz for Current Electricity

Q1: What is the SI unit of electric current?

A. Volt B. Coulomb C. Ohm D. Ampere

Q2: Which device is used to measure electric current?

A. Voltmeter B. Ammeter C. Galvanometer D. Ohmmeter

Q3: Ohm’s law is given by which relation?

A. V = IR B. V = I/R C. I = V + R D. R = V - I

Q4: What is the resistance of a conductor if current is 2A and voltage is 10V?

A. 20Ω B. 5Ω C. 0.2Ω D. 12Ω

Q5: What is the drift velocity in a conductor?

A. Speed of electron B. Speed of current C. Average velocity of electrons due to electric field D. Thermal velocity

Q6: Which of the following materials has the highest conductivity?

A. Copper B. Iron C. Aluminium D. Wood

Q7: Which one is not a factor affecting resistance of a conductor?

A. Length B. Material C. Temperature D. Mass

Q8: Resistivity depends on which of the following?

A. Length of conductor B. Cross-sectional area C. Material and temperature D. Current flowing

Q9: In series connection, the total resistance is:

A. Product of individual resistances B. Reciprocal of individual resistances C. Sum of all resistances D. Zero

Q10: Which of the following combinations will give minimum resistance?

A. All resistors in series B. All resistors in parallel C. Some in series, some in parallel D. None of the above

Q11: What is the unit of resistivity?

A. Ω B. Ω·m C. Ω/m D. A/V

Q12: Which law states the total current entering a junction equals the total leaving?

A. Ohm’s Law B. Faraday’s Law C. Kirchhoff’s Current Law D. Lenz’s Law

Q13: Current is defined as:

A. Charge per resistance B. Voltage per time C. Rate of flow of charge D. Force per unit area

Q14: A 60 W bulb operates at 120 V. What is its resistance?

A. 240Ω B. 2Ω C. 60Ω D. 80Ω

Q15: Electric power is given by:

A. VI B. IR C. V/R D. I/R

Q16: A wire of resistance R is stretched to double its length. What is new resistance?

A. R B. 2R C. 4R D. R/2

Q17: When current flows through a wire, electrons move from:

A. Negative to positive B. Positive to negative C. Both directions D. Stationary

Q18: A fuse is always connected in:

A. Neutral wire B. Earth wire C. Live wire D. Parallel

Q19: Unit of electric charge is:

A. Ampere B. Coulomb C. Volt D. Farad

Q20: When 2 resistors R1 and R2 are in parallel, the equivalent resistance is:

A. R1 + R2 B. R1 × R2 / (R1 + R2) C. 1/R1 + 1/R2 D. R1 - R2