Virtual Labs

What is the barrier potential of a Silicon diode and Germanium Diode at room temperature?

a: Si=0.3, Ge=0.7 Explanation

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b: Si=0.7, Ge=1 Explanation

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c: Si=1, Ge=0.3 Explanation

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d: Si=0.7, Ge=0.3 Explanation

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A silicon diode measures a low value of resistance with the meter leads in both positions. The trouble, if any, is

a: the diode is open. Explanation

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b: the diode is shorted to ground. Explanation

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c: the diode is internally shorted. Explanation

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d: the diode is working correctly. Explanation

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An ideal Si and an ideal Ge diode are connected in parallel with their anodes joined together and connected to a +5V supply and the cathodes joined together and connected to the other side of the supply voltage through a 1 K? resistor. If the current through the Si diode = IS and the current through the Ge diode = IG then select the correct answers from the options below.

a: IS = 4.3 mA & IG = 0 mA Explanation

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b: IS = IG= 2.15 mA Explanation

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c: IS = 0 mA & IG = 4.7 mA Explanation

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d: IS = IG = 2.35 mA Explanation

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Predict how all component voltages and currents in this circuit will be affected as a result of the following fault.

a: No current in circuit, no voltage across R1, full source voltage across D1. Explanation

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b: Increased current in circuit, full source voltage across R1, little voltage across D1. Explanation

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c: No current in circuit, no voltage across D1, full source voltage across R1. Explanation

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d: Large current in circuit, no voltage across R1, full source voltage across D1, D1 will most likely overheat and fail. Explanation

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Predict how all component voltages and currents in this circuit will be affected as a result of the following fault.

a: No current in circuit, no voltage across R1, full source voltage across D1. Explanation

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b: Increased current in circuit, full source voltage across R1, little voltage across D1. Explanation

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c: No current in circuit, no voltage across D1, full source voltage across R1. Explanation

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d: Large current in circuit, no voltage across R1, full source voltage across D1, D1 will most likely overheat and fail. Explanation

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Predict how all component voltages and currents in this circuit will be affected as a result of the following fault.

a: No current in circuit, no voltage across R1, full source voltage across D1. Explanation

Explanation

b: Increased current in circuit, full source voltage across R1, little voltage across D1. Explanation

Explanation

c: No current in circuit, no voltage across D1, full source voltage across R1. Explanation

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d: Large current in circuit, no voltage across R1, full source voltage across D1, D1 will most likely overheat and fail. Explanation

Explanation

VI Characteristics of a Diode