DP Physics (last assessment 2024)

Test builder »

Question 18M.2.HL.TZ2.8b.i

Select a Test
Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.2.HL.TZ2.8b.i
Level HL Paper 2 Time zone TZ2
Command term Calculate Question number b.i Adapted from N/A
b.i.
[Maximum mark: 2]
18M.2.HL.TZ2.8b.i

A negatively charged thundercloud above the Earth’s surface may be modelled by a parallel plate capacitor.

M18/4/PHYSI/HP2/ENG/TZ2/08

The lower plate of the capacitor is the Earth’s surface and the upper plate is the base of the thundercloud.

The following data are available.

Area of thundercloud base = 1.2 × 10 8   m 2 Charge on thundercloud base = 25  C Distance of thundercloud base from Earth's surface = 1600  m Permittivity of air = 8.8 × 10 12  F  m 1

(b.i)

Calculate in V, the potential difference between the thundercloud and the Earth’s surface.

[2]

Markscheme

V« Q C =»  25 6.6 × 10 7

V = 3.8 × 107 «V»

 

Award [2] for a bald correct answer

[2 marks]