Which inductor is used at high frequencies? Cast iron cored Sheet steel cored Ir

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics and Communication Engineering ‣ Materials and Components See What Others Are Saying!

Question
Which inductor is used at high frequencies?
Options
A. Cast iron cored
B. Sheet steel cored
C. Iron alloy cored
D. Ceramic cored

Correct Answer

Ceramic cored

Explanation

Cast iron, sheet steel and iron alloy have very high hysteresis and eddy current losses at high frequencies.

More questions

1. In which region of a CE bipolar transistor is collector current almost constant?
Options
A. Saturation region
B. Active region
C. Breakdown region
D. Both saturation and active region

4. In a broadcast superheterodyne receiver
Options
A. the local oscillator operates below the signal frequency
B. local oscillator frequency is normally double the IF
C. RF amplifier normally works at kHz above the carrier frequency
D. mixer input must be tuned to the signal frequency

6. Which one of the following potential does not satisfy Laplace's equations?
Options
A. v = 10 xy
B. v = p cos ?
C.
D. v = f cos ? + 10

7. The rate at which information can be carried through a communication channel depends on
Options
A. carrier frequency
B. bandwidth
C. transmission loss
D. transmitted power

9. It is known that noise phase modulates the FM wave. As the noise side band frequency approaches the carrier frequency, the noise amplitude
Options
A. will increase
B. will decrease
C. will remain constant
D. will reduce to negligible value

Comments

There are no comments.

More in Electronics and Communication Engineering: