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Question 21M.2.HL.TZ1.b.ii

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.2.HL.TZ1.b.ii
Level HL Paper 2 Time zone TZ1
Command term Calculate Question number b.ii Adapted from N/A
b.ii.
[Maximum mark: 1]
21M.2.HL.TZ1.b.ii

A device sends an impulse of electrical energy to maintain a regular heartbeat in a person. The device is powered by an alternating current (ac) supply connected to a step-up transformer that charges a capacitor of capacitance 30 μF.

 

The voltage across the primary coil of the transformer is 220 V. The number of turns on the secondary coil is 15 times greater than the number of turns on the primary coil.

Calculate the maximum charge Q0 stored in the capacitor.

[1]

Markscheme

Q0=0.0989≈0.1 «C» ✓

 

Allow ECF from (b)(i) (Q = 30 μF x V)

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