Please only answer if you know for sure!!! PHYS 1402 Quiz 11 Name: In an AC resi
ID: 2105500 • Letter: P
Question
Please only answer if you know for sure!!!
PHYS 1402 Quiz 11 Name: In an AC resistive circuit, when the current is at a minimum, the potential difference is at a maximum. zero. at a minimum. impossible to tell without knowing their phase. An inductor with inductance L is in series with an AC source. The most effective way to increase the reactance caused by the inductor would be to: increase the frequency of the AC source decrease the current I max decrease the frequency of the AC source increase the potential difference Delta V max To maximize the reactance in a circuit with a capacitor and source, you could: minimize the angular frequency and capacitance minimize the angular frequency and maximize the capacitance. maximize the angular frequency and capacitance. maximize the angular frequency and minimize the capacitance. The impedance of an RLC AC circuit is dependent on: the resistance only. the resistance, inductance and capacitance. the resistance and frequency. the resistance. inductance, and frequency. The primary coil in an ideal transformer has N turns. To output half the input potential difference, the secondary coil should have: N/2 turns. N turns. 2N turns. a number impossible to determine with the given information.Explanation / Answer
1.C
as V = IR
current is minimum at minimum pential difference
2. A
reactance of the inductor circuit = wL
to increase reactance in effective way we must increase frequency(w)
3. A
reactance in capacitor circuit = 1/wC
to maximize reactance we must minimize both frequency and capacitance
4.D
impedance Z =[R^2 +(1/wC - wL)^2 ]^0.5
so
Z depends on resistance , capacitance , inductance and frequency
5. A
V2/V1 = N2/N1
N2 = 0.5V1 x N/V1 = 0.5 N = N/2