Quiz & Circte true.on falss 1. True/False: Aver age frequency range of human hea

Question

Quiz & Circte true.on falss 1. True/False: Aver age frequency range of human hearing is about 20Hz to 20Kn. alse: Elephants can hear sound frequencies ranging from 1 3. True/alse: Elep 4. True/False: S phants and human share sound frequencies less than 20Hz queezing (applying force) piezoelectric crystal increases its size and dislocate electrons ocating electrons will create positive lon atoms in the piezoelectric crystal. 6. True/False: Separation of positive (ionized atoms) and negativè (electrons) charges creates an electric potential (voltage) 7. e/False: So, the applied external mechanical energy caused by force, E IF (N)L (m) converted to e lectrical potential (joules per unit charge, V-E/a /False: The electrical potential acts as bias voltage and excite free electrons. rue/false: In the STM machine, nano-size probe tips are made of piezoelectric crystals. rue/False: The biased voltage built up on the probe tip in the STM apparatus, provides suffi 10. cient energy to tunnel electrons between probe tip and test sample. True/False: If a current of 10 A (0) was displayed in 10 s () during the STM measurements, then the total tunneled charges is: Q-L.t 10 A x 10s 101C 12. True/False: It is very obvious that, the 1013 C charges were created by 10-13 ? 1.6 x 10-19C-6.25 x 10s electrons. 13. True/False: If the gap between probe tip and test sample was filled with a 10'oh conductor, then the bias voltage is: V - R.1-0.01 volt.

Explanation / Answer

1. True

2. False

3. False

4. False

5. True

6. True

7. True

8. False

  

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