WorksheetsReactance Capacitance
Total questions: 13
Worksheet time: 7mins
Frequency is measured in?
Seconds
Hertz
Henries
Farads
Capacitance is measured in?
Seconds
Hertz
Henries
Farads
Capacitive Reactance is measured in?
Amps
Volts
Ohms
Watts
What formula is pictured?
Inductive Reactance
Capacitive Reactance
EMF
Power
A resistor is connected to an AC power supply. The current in this circuit ____
Leads the voltage by 90
Lags the voltage by 45°
Lags the voltage by 90°
in phase with the voltage
A capacitor is connected to an AC power supply. The current in this circuit ____
Leads the voltage by 90°
Lags the voltage by 45°
Lags the voltage by 90°
in phase with the voltage
In an AC series circuit, the current in a pure resistor differs in phase with the applied voltage by what angle?
0°
45°
90°
80°
Which of the following statements is FALSE for a resistor connected in a simple series circuit to an operating AC generator?
I. The average power dissipated in the resistor is positive
II. The average power dissipated in the resistor is zero
III. The average current is zero
I only
II only
III only
I and III only
The graph below represents an AC circuit that consists of a generator and a capacitor. The voltage __________.
lags the current by 45°
lags the current by 90°
leads the current by 45°
leads the current by 90°
As the frequency of the AC voltage across a capacitor approaches zero, the capacitive reactance of that capacitor _______.
approaches zero
approaches infinity
becomes negative
does not change
Which of the following statements about capacitive reactance is true?
It is independent of capacitance
It is very small at low frequencies
decreases with increasing capacitance
increases with increasing capacitance
A capacitor of capacitance C has reactance X. If capacitance and frequency both become double, then the capacitive reactance will be
X/4
4X
X/2
2X
