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The right part consists of a germanium crystal, one single point-contact made of gold, a lamp and a battery. The battery is placed with the positive pole versus the n-type area of the germanium crystal. The negative pole is placed versus the p-type area and as in the example of the reversed biased diode no current is present in the circuit. The lamp does not shine.
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MLA style: "The Transistor". Nobel Media AB 2014. Web. 21 Oct 2017. <>