Question Pool: General Grade

Q1: How much power is being applied in a circuit when the applied voltage is 13.8 volts DC and current is 10A

Q2: What is the resistance of a circuit that draws 4A from a 12-volt source?

Q3: Which of the following does not change in a transformer?

Q4: A transformer core is laminated to

Q5: A certain oscillator has a tap on the inductor in the tank circuit.This oscillator is probably

Q6: For a forward bias diode the barrier potential _____ as temperature increases

Q7: Reverse break down isa condition in which a diode

Q8: Signals with a frequency above 30Mhz use _________ propagation

Q9: A 50Ω trasmission line that has impedance load of 300Ω has a VSWR

Q10: The input impedance at the center ofa dipole antenna is approximately

Q11: The characeteristic impedance of free space is ___ ohms

Q12: A zener diode has

Q13: Negative feedback in an amplifier

Q14: A series of RL flter circuit with an output across the inductor will result in what type of filtering

Q15: The DC current through each diode in a bridge rectifier equals

Q16: The oscillator that makes a communication receiver capable of receiving Morse codeis

Q17: A receiver has poor IF selectivity. I will therefore also have poor

Q18: Higher Q of a series circuit

Q19: When a transistor is used as switch its ON/OFF terminals are

Q20: For a satellite communication the frequency should be

Q21: When modulation of AM wave is decreased

Q22: The beakdown mechanism in a lightly doped p-n junction under reversebiased contion is called

Q23: Ohm's law not applicable to

Q24: In a pure capacitor the phase relation between the current and voltage is

Q25: The right most band in a resisitor indicates

Q26: A resonant frequency total impedance of series RLC circuit depends on

Q27: Which class of amplifier to pickup and reproduce weak radio signal is

Q28: Which block of the super hetrodyne receiver is known as first detector

Q29: Which of the following block is not present in tuned radio frequency

Q30: The range of carrier frquencies identified for amplitude modulation transmission falls in ____ band

Q31: For a signal band limited to W Hz thebandwidth of its SSB modulated signal is

Q32: For a class B amplifier theQpoint is

Q33: In FM modulation frequency deviation is mainly depemdt on

Q34: The primary advantage of a crystal oscillator is that

Q35: The intrinsic semiconductor at the absolute zero of temparature

Q36: For sustaining oscilations in an oscillator

Q37: An inductor opposes

Q38: In a full wave rectifier the current in each of the diode flows for

Q39: In the process of modulation in communication system

Q40: The output signal of a detector in a communication receiver is in

Q41: In a radio receiver the selectivity will be governed by

Q42: The emf of a cell depends on

Q43: The mutual inductance (M) between two coils of self inductance L1 & L2 is expressed as

Q44: The SI unit of resistivity is

Q45: The capacitance of a capacitor is not influenced by

Q46: A signal (fm) is amplitude modulated with a carrier (fc) the frequency value of lower side band is

Q47: The highest frequency that is reflected by an inosphere layer is

Q48: Two resistors are in parallel. Resistor A carries twice the current of ResistorB implies

Q49: The SSB transmission

Q50: Selectivity in a super hetrodyne receiver is achived primarily in the

Q51: The polarizationof an electromagnatic waveis defined by the direction of

Q52: What is the name of a current that flows only in one direction?

Q53: What is the standard unit of frequency?

Q54: How much voltage does an automobile battery normally supply?

Q55: Which of the following describes a linear amplifier?

Q56: How is the efficiency of an RF power amplifier determined?

Q57: Which of the following is an advantage of a Class C amplifier?

Q58: For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Q59: Which of the following is a characteristic of a Class A amplifier?

Q60: What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Q61: What portion of the AC cycle is converted to DC by a full-wave rectifier?

Q62: What portion of the AC cycle is converted to DC by a half-wave rectifier?

Q63: What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Q64: What type of receiver is suitable for CW and SSB reception but does not require a mixer stage or an IF amplifier?

Q65: What is an advantage of a crystal controlled transmitter?

Q66: A superhetrodyne receiver is tuned to 555 KHz and its local oscillator at 1010 KHz . The image frequency will be

Q67: 3 to 30 MHz band is known as

Q68: The wavelength of a broadcast station at 1000 KHz is

Q69: The core of power supply transformer is laminated to …

Q70: In a resonant circuit

Q71: When frequency of a carrier is varied according to modulation the result is

Q72: what is the phase relationship between the input and output of a common emitter circuit in degrees?

Q73: The quartz crystal oscillator is known for its

Q74: Which of the following is a characteristic of a liquid crystal display?

Q75: What is meant by the term MMIC?

Q76: What is a microprocessor?

Q77: What safety feature does a power-supply bleeder resistor provide?