A-LevelPhysicsPhysical quantities and units9702/12 · May/June 2019 · Q31 Mark
The Planck constant h has SI units Js. Which equation could be used to calculate the Planck constant?
Ah = DE / V where D is distance, E is energy and v is velocity
Bh = V / D where v is velocity and D is distance
Ch = 1 / 4πE where E is electric field strength
Dh = Fr² / m where F is force, r is radius and m is mass
✓ Correct answer
A: h = DE / V where D is distance, E is energy and v is velocity
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