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Electronics - Thyristors and Tranducers

@ : Home > Electronics > Thyristors and Tranducers > General Questions

Exercise

"Act well your part; there all honor lies."
- Alexander Pope
1. 

A TRIAC:

A. can trigger only on positive gate voltages
B. can trigger only on negative gate voltages
C. cannot be triggered with gate voltages
D. can be triggered by either a positive or a negative gate voltage

2. 

When checking a good SCR or TRIAC with an ohmmeter it will:

A. show high resistance in both directions
B. show low resistance with positive on anode and negative on cathode, and high resistance when reversed
C. show high resistance with negative on anode and positive on cathode, and low resistance when reversed
D. show low resistance in both directions

3. 

What does a hall effect sensor sense?

A. temperature
B. moisture
C. magnetic fields
D. pressure

4. 

What causes the piezoelectric effect?

A. heat or dissimilar metals
B. pressure on a crystal
C. water running on iron
D. a magnetic field

5. 

Which is the DIAC?

A. mca14_10012a1.gif
B. mca14_10012b1.gif
C. mca14_10012c1.gif
D. mca14_10012d1.gif




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