A-LevelPhysicsPhysical quantities and units9702/12 · May/June 2018 · Q41 Mark
A student applies a potential difference V of (4.0 ± 0.1)V across a resistor of resistance R of (10.0 ± 0.3)Ω for a time t of (50 ± 1)s. The student calculates the energy E dissipated using the equation below. E = (V²t)/R = (4.0² × 50)/10.0 = 80 J What is the absolute uncertainty in the calculated energy value?
A1.5 J
B3 J
C6 J
D8 J
✓ Correct answer
D: 8 J
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Physical quantities and units and see which topics are most likely to come up next.
Sign up free →