A capacitor charging circuit consists of a battery, an uncharged 20 uF capacitor, and a 5.6 kN resistor. At t =0s the switch is closed; 0.15 s later, the current is 0.62 mA Part A What is the battery's emf? Express your answer with the appropriate units. HA E = 10 V Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining

What is the power of a 1.00 X 102  MV lightning bolt having a current of 2.00 X 104 A ?

Is emf equal to pd of a source

Consider the circuit below. The battery has emf 80.0 V, R1=40 ohms, R2= 20 ohms and L= 5.0 mH. Initially the switch is open and no currents are flowing. What is the current through the battery immediately after the switch is closed? a) zero b) 1.3 A c) 2.0 A

What current ? is needed to transmit 105 MW of power over a transmission line held at a voltage of 25.0 kV? ?=   A Find the power loss ?loss that would occur in the transmission line if a 1.45 Ω line is used to transmit 105 MW of power. ?loss=   W What percent loss does this represent? percent loss:

Consider the arrangement shown in the figure below where R = 7.00 , l = 1.10 m, and B = 2.25 T. HINT R xx xxxx x xx x x x x xxxxxx xx xxxxxx x x xxx x xxxxxx xxxx xx (b) What power (in W) is delivered to the resistor? W tea B Fapp (a) Apply the motional emf equation in combination with Ohm's law. (b) Recall the expressions for the power delivered to a resistor. (c) Apply the expression for the magnetic force on a current-carrying wire. (d) Recall the expression P = Fv. Click the hint button again to remove this hint. (a) At what constant speed (in m/s) should the bar be moved to produce a current of 1.40 A in the resistor? m/s (c) What magnetic force (in N) is exerted on the moving bar? (Enter the magnitude.) N (d) What instantaneous power (in W) is delivered by the force Fapp on the moving bar? W

From the figure calculate the effective emf of the cell

What is the maximum power in W that can be generated from an 18 V emf using any combination of a 6.0 Q resistor, and 9.0 Q resistor?