if a radiographer want to half the voltage but keep the power constant what must she do to the current?
if a radiographer want to half the voltage but keep the power constant what must she...
What is the main purpose of a battery? To keep a constant current flow through the circuit. To keep a constant resistance in the circuit. To keep a constant voltage across the circuit. To put out as much power as possible. To put out a constant amount of power through the circuit.
If we have a single phase transformer, and we keep the primary voltage constant. what is the affect of the three types of loads in the secondary side(resisitive,inductive and capacitive) on the secondary winding.
A utility with the following customer profiles implements voltage reduction of 5%. Constant Power Customers (40%) (assume 1:1 reduction) Constant Current customers (20%) (assume 1:1 reduction) Constant impedance customers (40%) (assume 0:1 reduction) Estimate the resultant power reduction.
4. Suppose policymakers want to raise investment but keep output constant. In the IS-LM model, what combination of policies could be used to achieve these goals? Use graphs and explanations to thoroughly explain. 4. Suppose policymakers want to raise investment but keep output constant. In the IS-LM model, what combination of policies could be used to achieve these goals? Use graphs and explanations to thoroughly explain.
I am trying get the power supplied by the source and the power factor. I keep getting 0 watts and 1 for the power factor. Could you please assist me in why im not getting a number for the power and a number in between .85-.95 for the power factor. What should the power factor and power supplied be? XHMI R1 w 150 R2 Wattmeter-XWM1 0.000 W 3300 C1 1.73 F Power factor: 1.00000 V1 5Vpk 100Hz 0° Voltage Current...
The power supply of the circuit shown in the given figure supplies a voltage A = 7 V. Compute the current / and the power P that must be supplied 30 kn 80 kn 40 kn The current for the given circuit is 7x104A The power P that must be applied is [ *10-3 w.
Power Electronics and Drive Systems a) A boost converter is required to have an output voltage of 8 V and supply a load current of 1 A. The input voltage varies from 2.7 to 4.2 V. A control circuit adjusts the duty ratio to keep the output voltage constant. Select the switching frequency. Determine a value for the inductor such that the variation in inductor current is not more than 40 percent of the average inductor current for all operating...
3. A high-voltage power line operates on an rms voltage of 230 000 volts AC and delivers an rms current of 740 A to a resistive load. (a) What are the maximum instantaneous voltage and current? (b) What are the maximum instantaneous power and the average power delivered?
(A) What is the inductance? (B) If the voltage is held constant, what is the peak current at 64 MHz? An inductor has a peak current of 310 μA when the peak voltage at 32 MHz is 3.1 V |
(b) High voltage electric power transmitted to a city is dropped to a low voltage in a transformer before use. To keep the transformer at a steady temperature, heat (called the Joulean power dissipation) needs to be transferred to an ambient. Assuming the transfomer to be a vertical cylinder with a diameter of 0.4 m and height of 1 m, the walls are kept at 90°C in a stagnant fluid bath Determine the allowable heat dissipation if the fluid is...