A. Iron
B. Aluminium
C. Carbon
D Silver
Related Mcqs:
- Materials used in heat sink should have_____________?
A. high thermal conductivity
B. large surface area
C. high melting point
D. All of these - When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?
A. CB
B. Snubber circuit
C. Voltage clamping device
D. Fast acting current limiting device (FACL fuse) - Which of the following is disadvantage of fast recovery diodes?
A. Recovery is only 5 µs
B. Recovery is only 50 µs
C. Doping is carried out
D. None of these - Which of following devices has highest di/dt and dv/dt capability?
A. SIT
B. SITH
C. GTO
D. SCR - Which of the following is used in SCR to protect from high dV / dt__________________?
A. Snubber circuit
B. Fuse
C. Equalizing circuit
D. Circuit breaker - Which of the following is true about SIT?
A. SIT is a high power, high frequency device
B. SIT is a high power, low frequency device
C. SIT is a high power, high voltage device
D. SIT is a low power, high frequency device - Which of following is normally ON device?
A. SIT
B. BJT
C. TRIAC
D. IGBT - Which of following is not a power transistor?
A. IGBTs
B. COOLMOS
C. TRIAC
D. SITS - Which following is a two terminal three layer device?
A. BJT
B. Power dioed
C. MOSFET
D. None of above - By which one of the following we can measure the reliability of a string_____________?
A. String efficient
B. Reliability factor
C. Factor of safety
D. Derating factor
