ELECTRICAL CIRCUITS ECE REVIEWER
201. The distance between the capacitor plates increases two times, then its capacitance
A. Increases two times
B. Increases four times
C. Decreases two times
D. Decreases four times
202. The ratio between the active power and the apparent power of a load in an ac circuit is
called
A. Quality factor
B. Power factor
C. Power ratio
D. Power reactive
203. When the power factor of a circuit is zero,
A. Power absorbed is maximum
B. Power absorbed is minimum
C. Power absorbed is zero
D. The impedance is minimum
204. How many degrees of phase represents one full cycle?
A. 360
B. 180
C. 270
D. 90
,ELECTRICAL CIRCUITS ECE REVIEWER
205. Which of the following does not generally affect the value of a capacitor?
A. The dielectric material used
B. The surface area of the plates
C. The thickness of the dielectric
D. The voltage applied to the plate
206. What is the purpose of a load in an electric circuit?
A. To increase the circuit current
B. To decrease the circuit current
C. To utilize electrical energy
D. To make the circuit complete
207. The power factor of a certain circuit in which the voltage lags behind the current is 80 %. To
increase the power to 100 %, it is necessary to add to the circuit.
A. Inductance
B. Capacitance
C. Resistance
D. Impedance
208. Refers to the outward-curving distortion of the lines of force near the edges of two parallel
metal plates that form a capacitor.
A. Skin effect
B. Night effect
C. Edge effect
D. Hall effect
209. If voltage across the plates of 2 F capacitor is increased by 4 V, then charge on the plates
will
A. Decrease by 2 C
B. Increase by 2 C
C. Decrease by 4 C
D. Increase by 4 C
,ELECTRICAL CIRCUITS ECE REVIEWER
210. What does a capacitor store?
A. Voltage
B. Charge
C. Current
D. Power
, ELECTRICAL CIRCUITS ECE REVIEWER
211. The mutual inductance between two coils is the reluctance of magnetic path.
A. Directly proportional to
B. Inversely proportional to
C. Independent to
D. Equal to
212. The result of rust in electrical (wire) connection is
A. Inductance
B. Conductance
C. Impedance
D. Resistance
213. Which of the following is a disadvantage of a wire-wound resistor?
A. It has reactance in radio-frequency circuits
B. It cannot handle much power
C. It draws a large amount of current
D. It cannot handle high voltage
214. The resistance of an insulator when its temperature is increased.
A. Decreases
B. Remains the same
C. Increases
D. Varies
215. The wavelength of an alternating waveform depends upon the of the variation.
A. Period
B. Number
C. Frequency
D. Amplitude
216. Delta to wye or wye to delta transformation technique is applied to a network.
201. The distance between the capacitor plates increases two times, then its capacitance
A. Increases two times
B. Increases four times
C. Decreases two times
D. Decreases four times
202. The ratio between the active power and the apparent power of a load in an ac circuit is
called
A. Quality factor
B. Power factor
C. Power ratio
D. Power reactive
203. When the power factor of a circuit is zero,
A. Power absorbed is maximum
B. Power absorbed is minimum
C. Power absorbed is zero
D. The impedance is minimum
204. How many degrees of phase represents one full cycle?
A. 360
B. 180
C. 270
D. 90
,ELECTRICAL CIRCUITS ECE REVIEWER
205. Which of the following does not generally affect the value of a capacitor?
A. The dielectric material used
B. The surface area of the plates
C. The thickness of the dielectric
D. The voltage applied to the plate
206. What is the purpose of a load in an electric circuit?
A. To increase the circuit current
B. To decrease the circuit current
C. To utilize electrical energy
D. To make the circuit complete
207. The power factor of a certain circuit in which the voltage lags behind the current is 80 %. To
increase the power to 100 %, it is necessary to add to the circuit.
A. Inductance
B. Capacitance
C. Resistance
D. Impedance
208. Refers to the outward-curving distortion of the lines of force near the edges of two parallel
metal plates that form a capacitor.
A. Skin effect
B. Night effect
C. Edge effect
D. Hall effect
209. If voltage across the plates of 2 F capacitor is increased by 4 V, then charge on the plates
will
A. Decrease by 2 C
B. Increase by 2 C
C. Decrease by 4 C
D. Increase by 4 C
,ELECTRICAL CIRCUITS ECE REVIEWER
210. What does a capacitor store?
A. Voltage
B. Charge
C. Current
D. Power
, ELECTRICAL CIRCUITS ECE REVIEWER
211. The mutual inductance between two coils is the reluctance of magnetic path.
A. Directly proportional to
B. Inversely proportional to
C. Independent to
D. Equal to
212. The result of rust in electrical (wire) connection is
A. Inductance
B. Conductance
C. Impedance
D. Resistance
213. Which of the following is a disadvantage of a wire-wound resistor?
A. It has reactance in radio-frequency circuits
B. It cannot handle much power
C. It draws a large amount of current
D. It cannot handle high voltage
214. The resistance of an insulator when its temperature is increased.
A. Decreases
B. Remains the same
C. Increases
D. Varies
215. The wavelength of an alternating waveform depends upon the of the variation.
A. Period
B. Number
C. Frequency
D. Amplitude
216. Delta to wye or wye to delta transformation technique is applied to a network.
