Question

tilt). line t + USC) mm Kodt) . Figure 1 To How should the wattmeter be hooked up in correct wattage and Power Factor based on figure 1? the following Multisim Cirmit to read the 2. If Us (t) = Stos (628.324+Ous), what value should the voltage sonne have in the following Multisim Cirmit?

Answer 1

here the voltage terminals of the wattmeter is connected in parallel to the source and the current coil terminals are connected in series. In fig shows the connection diagram

+V. 42 ho 14) How 9 Lt) mo Bline f Road Vload

here the wattmeter measure the power delivered by the source

(why because Voltage coil terminals are connected across the source voltage- it measures the source voltage v(t) and the current coil is connected in series to the source therefore it measures the current delivered by the source i(t)  )

power measured by wattmeter = v_s(t)*i(t)

coming to second one here source voltage is given that V_s (t)= 5*$\tiny \cos (628.32t +\Theta )$

2*pi*f =628.32

f= 628.32/(2*pi) = 100 Hz

V_peak = 5 V

*here delay angle not given

if you have any doubts please comment

thank you