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Northern IrelandTechnology and DesignQuick questions
AS 1 Electronic and Microelectronic Systems
Quick questions on The transistor as a switch: NPN, MOSFET, Darlington pair and the flyback diode - CCEA A-Level Technology and Design
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
State the approximate base-emitter voltage at which an NPN transistor turns on. [1 mark]
What is q2?Show answer
A transistor must pass a collector current of 50 mA and has hFE = 200. Find the minimum base current. [2 marks]
What is q3?Show answer
Why is a diode fitted across a relay coil, and which way round? [2 marks]
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