1) 2) 3) り2345万 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) A zener diode is also called a tuning diode. 2) Power dissipation in a zener diode is the product of zener voltage and the current in the zener. 3) Photodiodes and varactor diodes are normally operated with reverse-blas. 4) A diode with a negative resistance characteristic is a varactor diode. 5) The forward voltage across an LED is considerably less than for a silicon diode. 6) Different color LEDs require different forward voltages to operate. 7) The crystalline solar cell converts sunlight to electricity using the photovoltaic effect. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 8) When a zener diode is forward biased, the voltage drop will be approximately A) Vz -0.7 V B) 0.7 V 9) Reverse leakage current for a zener diode is specified A) at the knee voltage B) in reverse breakdown C) at a voltage that is less than the knee voltage D) none of the above 10) Zener impedance is defined as C) Vz D) VZ+0.7 V A) Vz/lz B) AVZ/A/Z C) VZM/ZM D) VZK/IZK 11) A 1N4742A has a maximum power rating of 1.0 W at 50 °C. The derating factor is 9.67 mW/"C. If it is operated at 70 °C, the maximum power is A) 1.2 W B) 0.9 W C) 1.1 W D) 0.8 W 10) 11)