A. high thermal conductivity
B. large surface area
C. high melting point
D. All of these
Related Mcqs:
- Which of the following is used in heat sink_____________?
A. Iron
B. Aluminium
C. Carbon
D Silver - In forward blocking mode of a thyristor________?
A. junction J2 is in reverse bias and J1, J3 is in forward bias.
B. junction J3 is in forward bias and J1, J2 is in reverse bias.
C. Junction J1, J3 is in reverse bias and J2 is in forward bias.
D. Junction J1 and J2 is in forward bias and J3 is in reverse bias. - Under normal operating condition voltage clamping device offers impedance of_________?
A. high value.
B. low value.
C. zero value.
D. moderate value. - A thyristor can termed as__________?
A. AC switch
B. DC switch
C. Both a and B
D. Square wave switch - A modern power semiconductor device that combines the characteristic of BJT and MOSFET is_____________?
A. IGBT
B. FCT
C. MCT
D. GTO - ON state voltage drop across SCR lie between the range_____________?
A. 0 – 0.5 V.
B. 0.5 – 1 V.
C. 1 – 1.5 V.
D. 1.5 – 2 V. - In a single phase full wave rectifier, during blocking state the pea inverse voltage of diode is______________?
A. V m
B. 2 V m
C. V m / 2
D. 4 V m - In a 3 phase VSI out of eight valid states, the number of valid states that produce zero ac line voltages is/are_________?
A. One
B. two
C. Three
D. Four - A crowbar is a circuit which is used to protect a_____________?
A. voltage sensitive load from excessive dc power supply output voltages
B. current sensitive load from excessive dc power supply output voltages
C. voltage sensitive load from excessive ac power supply output voltages
D. current sensitive load from excessive ac power supply output voltages - Regulator sampling PWM is usually used in___________?
A. High power inverters
B. Rectifiers
C. Low power inverters
D. Only A. and B.