MCAT Physics Question — Electric Field
- Sep 09, 2014
- MCAT Question of the Day
The strength of the electric field due to a point charge is given by the relationship: E=kq/r2. If E is the strength of the field at the original location, E’=kq/(3r)2=kq/(9r2). E’=E/9, i.e. E=9E’, and the ratio of the strength of the electric field at the original location to the strength at 3x the distance is 9:1.
a) 9:1, correct.
b) 3:1, incorrect, This would be true only if the E was inversely proportional to the distance, but E is inversely proportional to the distance squared.
c) 1:3, incorrect, This would be true if E was proportional to the distance, but E is inversely proportional to the distance squared.
d) 1:9, incorrect, This would only be true if E was proportional to the distance squared, but E is inversely proportional to the distance squared.
Want more MCAT practice?
We’ve got options for every schedule and learning style!
From the best online MCAT course created by top instructors with 524+ MCAT scores to the most representative full-length practice exams and private tutoring, we can custom tailor your MCAT prep to your goals!
Not sure which option is right for you? Schedule a free MCAT consultation with an MCAT expert using the form below. No obligation, just expert advice.
Search the Blog
Free ConsultationSchedule Now
Free MCAT Practice AccountNeed great MCAT practice?
Get the most representative MCAT practice possible when you sign up for our free MCAT Account, which includes a half-length diagnostic exam and one of our full-length MCAT practice exams.Learn More