6A56 - Assuming a power source to have a fixed value of internal impedance, maximum power will be transferred to the load when:

A.The load impedance equals the internal impedance of the source

B.The load impedance is higher than the source impedance

C.The load impedance is lower than the source impedance

D.None of the above

  • 0 explanations
  • 0 requizzes

6A57 - When two sine waves of the same frequency do not reach their maximum or minimum values simultaneously:

D.A & C

A.A phase difference exists

B.A phase difference does not exist

C.The sign waves are out of phase

  • 0 explanations
  • 0 requizzes

6A58 - Which method may be used to obtain more than one value of voltage from a fixed DC source?

C.Both A & B

A.Use a resistance type voltage divider

B.Connect voltage regulator tubes of suitable values and tap off the desired output voltage

D.None of the above

  • 0 explanations
  • 0 requizzes

6A60 - Two 10 W, 500 ohm resistors in parallel will dissipate how many watts?

A.20 watts

B.10 watts

C.30 watts

D.40 watts

  • 0 explanations
  • 0 requizzes

6A61 - A 20 ohm resistor with a current of 0.25 A passing through it will dissipate how many watts?

D.1.25 watts

A.10 watts

B.20 watts

C.0.025 watts

  • 1 explanation
  • 0 requizzes

6A62 - If the voltage to a circuit is doubled and the resistance is increased to three times the original value, what will be the final current?

B.2/3 the original current

A.1/3 the original current

C.3 times the original current

D.None of the above

  • 0 explanations
  • 0 requizzes

6A63 - If a vacuum tube with a filament rating of 0.25 A and 5 V is operated from a 6 volt battery, what value of resistor is necessary?

A.4 ohms

B.5 ohms

C.10 ohms

D.2 ohms

  • 0 explanations
  • 0 requizzes

6A64 - The minimum power dissipation rating of a resistor of 20,000 ohms across a potential of 500 V should be:

A.25 watts

B.12.5 watts

C.15 watts

D.None of the above

  • 0 explanations
  • 0 requizzes

6A65 - The total power dissipation capability of two 10 watt, 500 ohm resistors connected in series is:

A.20 watts

B.10 watts

C.5 watts

D.None of the above

  • 0 explanations
  • 0 requizzes

6A67 - What is the maximum current carrying capacity of a resistor of 5000 ohms, 200 watts?

A.0.2 A

B.1 A

C.1.2 A

D.None of the above

  • 0 explanations
  • 0 requizzes

6A68 - What is the total resistance of a parallel circuit consisting of a 10 ohm branch and a 25 ohm branch?

D.7.14 ohms

A.@ ohms

B.10.3 ohms

C.7.0 ohms

  • 0 explanations
  • 0 requizzes

6A69 - The current through two resistors in series is 3 A. Resistance #1 is 50 ohms, resistance #2 drops 50 V across its terminals. What is the total voltage?

A.200 V

B.220 V

C.110 V

D.180 V

  • 0 explanations
  • 0 requizzes

6A70 - An 18 ohm and a 15 ohm resistor are connected in parallel; a 36 ohm resistor is connected in series with this combination; a 22 ohm resistor is connected in parallel with this total combination. The total current is 5 A. What current is flowing in the 15 ohm resistor?

A.0.908 A

B.1.000 A

C.1.908 A

D.0.809 A

  • 0 explanations
  • 0 requizzes

6A71 - A circuit passes 3 A. The internal resistance of the source is 2 ohms. The total resistance is 50 ohms. What is the terminal voltage of the source?

A.150 V

B.100 V

C.110 V

D.240 V

  • 0 explanations
  • 0 requizzes

6A72 - A relay coil has 500 ohms resistance, and operates on 125 mA. What value of resistance should be connected in series with it to operate from 110 VDC?

A.380 ohms

B.400 ohms

C.200 ohms

D.None of the above

  • 0 explanations
  • 0 requizzes

6A73 - Given: Input power to a receiver is 75 watts. How much power does the receiver consume in 24 hours of continuous operation?

C.A & B

A.1800 watthours

B.1.80 kilowatthours

D.None of the above

  • 0 explanations
  • 0 requizzes

6A74 - The total reactance when two capacitances of equal value are connected in series is:

B.The sum of the two individual reactances in ohms

A.The product of the two individual reactances in ohms

C.The difference of the two individual reactances in ohms

D.None of the above

  • 0 explanations
  • 0 requizzes

6A75 - A capacitor's charge is stored:

C.A & B

A.Upon the inner surface of the capacitor plates

B.As an electrostatic field which exists in the space between the plates

D.None of the above

  • 0 explanations
  • 0 requizzes

6A76 - The voltage drop across an individual capacitor of a group of capacitors connected in series across an AC source is:

D.All of the above

A.Inversely proportional to the ratio of the capacitance of the capacitor being considered

B.Inversely proportional to the total capacitance of the combination

C.Directly proportional to the applied voltage across the series combination

  • 0 explanations
  • 0 requizzes

6A77 - What is the total capacitance of the capacitors of 3, 5, and 7 microfarad connected in series?

B.1.479 microfarad

A.14.79 microfarad

C.15 microfarad

D.None of the above

  • 0 explanations
  • 0 requizzes