A 2 kΩ resistor and a 0.002 μF capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is 84.5 mW 845 mW 13 mW 130 mW TRUE ANSWER : ? YOUR ANSWER : ?
In a series RC circuit, when the frequency and the resistance are halved, the impedance cannot be determined without values is reduced to one-fourth is halved doubles TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit does not change decreases to zero decreases increases TRUE ANSWER : ? YOUR ANSWER : ?
What is the value of the hypotenuse of a right triangle whose sides are 12 and 18? 2.16 4.24 3.46 21.63 TRUE ANSWER : ? YOUR ANSWER : ?
The complex number 6 + j6 is equivalent to 645° 8.4890° 8.4845° 3645° TRUE ANSWER : ? YOUR ANSWER : ?
The complex number 40 angle 55° is equivalent to 45.88 + j65.52 40 + j40 22.94 + j32.76 55 + j55 TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency of the voltage applied to a series RC circuit is increased, the phase angle increases becomes erratic remains the same decreases TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency of the voltage applied to a series RC circuit is decreased, the impedance doubles increases decreases remains the same TRUE ANSWER : ? YOUR ANSWER : ?
A 12 kΩ resistor is in series with a 0.02 μF capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.3 angle 0° mA, what is the source voltage expressed in polar form? 4.11 V 0.411 V 411.3 V 45.6 V TRUE ANSWER : ? YOUR ANSWER : ?
In a parallel RC circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is 141 mA 282 mA 100 mA 200 mA TRUE ANSWER : ? YOUR ANSWER : ?