Q&A Forum
1129 questions found
The most suitable class of amplifier for a high fidelity radio transmitter is
- B.
- C.
- A.
Class C is specially designed for RF and only that and can't be used for audio
The output of a tachogenerator should be
- exponential.
- linear.
- sinusoidal.
in the question it is not mentioned it is referring to AC
A circuit containing a resistor, capacitor and inductor where resonant frequency is met, what will the impedance of the circuit be?
- Maximum.
- Resistance across the resistor.
- Zero.
The question does not say if the LCR circuit is in series or parallel.
Series RLC at resonance: XL and XC cancel, leaving only R. Impedance = low (just R, could be very low if R is small).
Parallel RLC at resonance: XL and XC still cancel in terms of reactance, but because the components are in parallel, this results in high impedance — approaching infinite in the ideal case
Consumption of alcohol
- increases mental and physical reaction times.
- does not change mental or physical reactions.
- decreases mental and physical reaction times.
I chose the correct answer, as confirmed by the notes at the bottom. However, it was marked as incorrect.
On large aircraft, braked wheel assemblies are normally inflated with
- nitrogen.
- nitrogen and not more than 5% of air.
- an argon and CO2 mixture.
ONE ANSWER IS ONLY NITROGEN AND ANOTHER SAYS
nitrogen and not more than 5% of air. WHICH ONE IS CORRECT?