An example of an uncontrollable preanalytical variable would be

A voltmeter is connected in:a. Series  b. Parallel  c. Either  d. Doesn’t matter

Coulomb’s law constant \( k \) has units of:a. N·m  b. V/m  c. N·m²/C²  d. C²/N·m²

What is the SI unit of electric field?a. N  b. N/C  c. V  d. C/N

Electric potential is defined as:a. Potential energy per unit charge  b. Charge per unit voltage  c. Current per unit resistance  d. Energy per unit current

Kirchhoff’s loop rule is based on:a. Conservation of energy  b. Conservation of charge  c. Ohm’s Law  d. Conservation of momentum

What is the direction of the electric field produced by a positive point charge?a. Away from the charge  b. Toward the charge  c. Perpendicular to the charge  d. In circles around the charge

Capacitors in series combine as:a. C = C₁ + C₂ + …  b. C = C₁C₂  c. 1/C = 1/C₁ + 1/C₂  d. C = 1/C₁ + C₂

A 9 V battery in series with 3 Ω and 6 Ω resistors has total current of:a. 1 A  b. 0.5 A  c. 3 A  d. 2 A

A 4 μF capacitor connected to a 12 V battery stores energy of:a. 144 μJ  b. 288 μJ  c. 576 μJ  d. 48 μJ