For a simple resistive element, current is directly proportional to voltage. The current waveform will therefore be essentially the same shape as the voltage waveform. For an inductive coil with negligible resistance, the relation between voltage and current is given by equation (2.30), i.e. v=...
The current isI=V/Z= 12/11.81 = 1.02 A. 2 FromEquation (4.52)the reactive power is Q = I2XL= 1.022× 6.28 = 6.53 Var 3 The power factor is cos ϕ =R/Z= 10/11.81 = 0.846 lagging. Example 4.23 For the series-parallel circuit ofFig. 4.43determine: ...
When the secondary of an air-cored transformer, of inductance N, is closed through a total resistance Q, the effective resistance P' and the effective inductance L' of the primary are given by (P' - P) = p2M2Q/(Q2 + p2N2), (L - L') = p2M2N/(Q2 + p2N2), where M is the...
The influence of ion-size on the ion insertion/de-insertion dynamics is also quantified by electrochemical impedance spectroscopy (EIS). Bode magnitude and phase plots obtained for each anion at different gate voltages are shown in Supplementary Fig.8. The effective volumetric capacitance (\({C}_{...
This equation for the rotation rate of atoms can be derived from the relation between the circulating current and the movement of atoms relative to the Josephson junctions. The parameter βatom is analogous to the screening parameter in the conventional SQUID and can be thought as proportional to...
We have seen that ω = γB and hence the energy of the radio waves needed to cause a transition between the two spin states is given by equation (2): E = ηγB (2) When the energy of the photon matches the energy difference between the two spin states, absorption of energy occurs...
where σ is a spread parameter: the larger σ, the slower the grey level values decrease aside the center circle. Referring to Equation 1, G 2 π σ is the maximum gray level value. It holds for the pixels of the center circle. The parameter G is such that G 2 π σ min =1 in...
Mobility ratio is defined as the ratio of the mobility of the injectant (water) to the mobility of the displaced fluid (oil). Equation (1) depicts the mobility ratio of a waterflood as: $$M = {\raise0.7ex\hbox{${K_{\text{w}} \mu_{\text{o}} }$} \!\mathord{\left/ {\vpha...
An induction motor is an alternating-current motor in which a primary winding on one member (usually the stator) is connected to the power source and a polyphase secondary winding or a squirrel-cage secondary winding on the other member (usually the rotor) carries induced current. ...
The force on a current-carrying conductor is given by equation (2.27), i.e. F=BIL The torque on one armature conductor is therefore (2.68)T=Fr=BavlIar where r is the radius of the armature conductor about the centre of rotation, Ia is the current flowing in the armature conductor l ...