A resistor __________________.
a. stores an electric charge
b. is measured in coulombs
c. cause a voltage drop across it
d. dependent on lines of force Answer- c. cause a voltage drop across it
1 kΩ is the same as _________.
a. 1000 ohms
b. .001 ohms
c. 10e-2 ohms
d. 10000 ohms Answer- a. 1000 ohms
A resistor with color bands orange, red, brown is _____.
a. 3.2 mega ohms
b. 232 ohms
c. 2.3 kilo ohms
d. 320 ohms Answer- d. 320 ohms
A circuit with 500 ohm resistor in series with three 500 ohms connected in parallel with each other. The total resistance would be a. 666 ohms
b 167.7 ohms
c. 750 ohms
d. 1000 ohms Answer- a. 666 ohms
The voltage rating of a capacitor...
a. must be factored into reactance formula
b. relates to max voltage that should be applied to it
c. indicates max current allowed
d. is same as power factor Answer- b. relates to max voltage that should be applied to it Calculating the total capacitance of several capacitors in parallel _____.
a. is not necessary as they are used
b. causes a need to consider inductance factors
c. is done by adding each of the capacitance values
d. adding by the reciprocal of capacitance values Answer- c. is done by adding each
of the capacitance values
Ferrite _____.
a. is a dielectric
b. is a common inductor core material
c. is most common resistor coating
d. causes faulty saturation of inductors Answer- b. is a common inductor core material
The term Henry refers to _____.
a. the inductive property of a coil
b. the inventor of inductors
c. reactance of LR circuits
d. resonant frequency of tank circuits Answer- a. the inductive property of a coil
A certain transformer has 250 turns in the primary windings and 1250 turns in the secondary winding. The turns ratio is __________.
a. 0.2
b. 2.5
c. 5
d. 0.5 Answer- a. 0.2
When the turns ration of a transformer is 10 and the primary AC voltage is 8V, the secondary voltage is _____.
a. 80 volts
b. 0.8 volts
c. 8 volts
d. 64 volts Answer- b. 0.8 volts
Which of these color code patterns is found of a 270Ω 5% resistor?
a. red, violet, brown, silver
b. red, violet, brown, gold
c. red, brown, black, silver
d. red, violet, black , silver Answer- b. red, violet, brown, gold
One microfarad is equivalent to __________ picofarads.
A. 10 B. 1000
C. 100,000
D. 1,000,000 Answer- D. 1,000,000
The capacitance of a capacitor with 10uC of electric charge and 100V across its plates is ____.
a. 0.1uF
b. 10uF
c. 1000uF
d. 107uF Answer- a. 0.1uF
The atomic number of an element is the same as the element's atomic weight
a. True
b. False Answer- b. False
An increase in voltage with resistance held constant cause current to _____.
a. decrease
b. increase twice to value of voltage
c. increase
d. none of the above Answer- c. increase
The ampere, expresses __________. A. Volts/sec increase
B. A unit of charge movement per second past a given point
C. Coulombs/charge
D. An increase in resistance Answer- B. A unit of charge movement per second past
a given point
The total resistance of a parallel circuit with equal branch resistance is found by _____.
a. adding all branch resistance values
b. by taking product of all branch resistance values
c. by dividing resistance value of a branch by the number of branches
d. value cannot be found Answer- c. by dividing resistance value of a branch by the number of branches
A 12 vdc power supply has a 15 ohm internal resistance. What load resistance can be connected to transfer max power?
a. 15 ohms
b. 20 ohms
c. 6 ohms
d. 10 ohms Answer- a. 15 ohms Maximum power transfer occurs when the load impedance is equal to source impedance.
a. True
b. False Answer- a. True
What will happen to the current through a resistor if resistor value increases?
a. current increases
b. current stays same
c. current decreases
d. current and voltage increase across the resistor Answer- c. current decreases
What type of circuit has the same voltage drop across each component?
a. parallel
b. series-parallel
c. series
d. combination Answer- a. parallel
Total power in a series circuit is determined by the:
a. Source voltage times the current
b. Total voltage applied
to the circuit
c. Current flowing through the switch
d. Average wattage rating of each resistor Answer- A. Source voltage times the current
What is the equivalent to 100 microamps?
a. .1 milliamps
b. 1 milliamps
c. 10 milliamps
d. 10 nanoamps Answer- a. .1 milliamps
B+, or supply voltages in electronics products, is considered to be:
a. +5 to +12 VDC
b. 0 to 30 V DC
c. +12 to 300 V DC d. The anode or plate voltage supply Answer- C. +12 to 300 V DC
Leakage current in an electronic product, between either of the AC power cord conductors and chassis or any exposed metal parts should not exceed _____.
a. 5 microamps
b. 500 microamps
c. 5 milliamps
d. 50 milliamps Answer- b. 500 microamps