Electric Potential & Capacitance Quiz

Assignment ID #1234 is invalid! Here are some practice problems you can complete instead:

For the Coulomb constant, use k = 8.99×10⁹ N·m²/C². For the permittivity of free space, use ε₀ = 8.85×10^-12 C²/N·m².
Assume capacitor plates are in a vacuum (κ = 1) unless the problem states otherwise.
Make sure you use the correct sign for each answer!
Please try to get within 1% of the correct answer. You can enter your answers in decimal notation, or you can enter them in scientific notation using 'E' or 'x 10^' for the power of 10 (e.g., enter 6.02 x 10²³ as 6.02E23 or 6.02x10^23).

#	Problem	Answer
1.	Given: electric potential (V): -1 × 106 V distance (r): 5.8 × 10-5 m Wanted: point charge (q) in C?	C
2.	Given: point charge (q): 1.60 × 10-12 C distance (r): 4.9 × 10-5 m Wanted: electric potential (V) in V?	V
3.	Given: electric field strength (E): 1200 V/m distance (r): 0.005 m Wanted: difference in electric potential (ΔV) in V?	V
4.	Given: electric field strength (E): 2000 V/m charge (Q): 2 × 10-10 C distance between plates (d): 0.0039 m Wanted: capacitance (C) in F?	F
5.	Given: energy (U): 3.2 × 10-17 J Wanted: energy (U) in electronvolts?	eV
6.	Given: energy (U): 1.60 × 10-15 J Wanted: energy (U) in electronvolts?	eV
7.	Given: point charge (q): 1 × 10-7 C difference in electric potential (ΔV): -33 V Wanted: work (W) in J?	J
8.	Given: charge (Q): 4.4 × 10-8 C area of plates (A): 0.072 m2 Wanted: electric field strength (E) in V/m?	V/m
9.	Given: electric field strength (E): 40000 V/m distance (r): 0.008 m Wanted: difference in electric potential (ΔV) in V?	V
10.	Given: electric field strength (E): 1 × 106 V/m capacitance (C): 4.3 × 10-9 F distance between plates (d): 9.6 × 10-4 m dielectric constant (κ): 7  Wanted: charge (Q) in C?	C

Grade It!