A potentiometer is basically a variable resistor. A typical potentiometer has three terminals which can be used in two modes according to the voltage divider principle. The analogy of the infinite resistance, however, is in terms of its use in measuring the EMF of a cell....
I understand work to be zero when there is either no displacement, no forces acting parallel to object or if friction and air resistance is not considered. Here is a simpler problem where i get the right answer if i set W = 0 but where i don't see WHY work done is zero: Harry is...
aSinusoidal current and voltage. Maximum value, rms (root mean square) value. Impedances in series add. The inverses of impedances in parallel add. 正弦潮流和电压。 最大价值, rms (根均方)价值。 阻抗在系列增加。 阻抗反面平行增加。[translate] ...
currents are equal and opposite. Twisted pair computer communications cables are a common example where the voltage of both signals are above ground. This implies both currents and/or voltages are driven in some manner. The signal of interest is the difference between the two referenced to each ...
Why is tension not a self-adjusting force? What are the factors that tension depends on? Self Adjusting Force: According to Newton's laws of motion, the force is equal to the product of the mass of an object and the acceleration experienced by the object. A force c...
In Western country, superintendent and staff tendency and mutually equal.The work fluidity is big, is not strong to the employer dependence.But the management system foundation is the achievement appraisal the non-social relations.The drive is the establishment in the material base, but is not the...
When you have an OPT (OutPut Transformer), the voltage is stepped down from the high voltage on the power tubes to the low voltage/high current of the loudspeaker. People often don't think of this, but if you don't have to make so much voltage in the amplifier, you also don't ...
(antenna). The gate bias resistor RG is used to ensure that the gate is AC isolated from the ground and the RF path at all frequencies. A DC voltage (VCTRL) is applied to the gate to effect the switching action. In the circuit, ZSG= ZL= ZC, where ZCis the charact...
For each loop, we want to use a loop voltage (VLOOP) and a loop current (ILOOP) such that the apparent impedance between that loop voltage and current is the positive-sequence line impedance between the relay and a zero-resistance (bolted) fault in that loop. Consider a bolted AG fault....
Why is a voltage produced when a coil spins? Explain. Why there is no intensity distribution due to single wave? Why does kinetic energy equal 1/2mv^2? Why is emf induced if there is a change in flux? In an Atwood machine, why do the tensions that handle both bodies are the same?