Physics Unit 2 0.0 / 5 ? PhysicsPhysics Unit 2GCSEAQA Created by: camKDCreated on: 06-04-14 18:54 What is the frequency of the a.c. mains electricity in the UK? 50 Hz 1 of 5 What are two advantages of using a RCCB? -can be reset -disconnects circuit faster 2 of 5 ble ble 3 of 5 ble ble 4 of 5 ble ble 5 of 5
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