The superhet rodyne receiver is quite important in a radio receiver.
It enable the receiver to use a single frequency as the center frequency of the band-pass filter. this frequency is the Intermediate Frequency (IF).
The received signal is going through a frequency translation (in practice it goes through a mixer), which makes it
IF centered.
It should be noted that a static filter is much easier to build and is much more efficient.
What is Energy Engineering?
Do you know how does energy engineering job benefit the environment?
Do you know what energy systems engineers do?
A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is A. 0.58 Ah B. 2.1 Ah C. 21 Ah D. 58 Ah
A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is A. 8.57% B. 42.85% C. 4.28% D. 85.7%
A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume? A. 20.16 kWh B. 201.6 kWh C. 2.01 kWh D. 8.4 kWh
In 0.025 W, there are A. 25 kW B. 0.00025 mW C. 2,500 µW D. 25 mW
When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is A. overheated B. shorted C. open D. reversed
A 33 half-watt resistor and a 330 half-watt resistor are connected across a 12 V source. Which one(s) will overheat? A. 33 B. 330 C. both resistors D. neither resistor
A 68 resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is A. 132 mW B. 13.2 mW C. 22.6 mW D. 226 mW
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