Question 31
Question 31 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
18. Electric fields
18.2. Uniform electric fields

recall and use E = ΔV / Δd to calculate the field strength of the uniform field between charged parallel plates

20. Magnetic fields
20.3. Force on a moving charge

understand the origin of the Hall voltage and derive and use the expression VH = BI / (ntq), where t = thickness

24. Medical physics
24.2. Production and use of X-rays

explain that X-rays are produced by electron bombardment of a metal target and calculate the minimum wavelength of X-rays produced from the accelerating p.d.