The energy in the capacitor is delivered by placing paddles on either side of the victim's heart as shown in the figure. The defibrillator delivers the charge stored in the capacitor through the paddles, hopefully resetting the heart so it can begin beating normally. The charge is delivered in a sudden pulse that lasts about 100 ms. What is the average current flowing through the body?‹I› =  _____ A What is the rate at which the energy stored in the capacitor is transferred to the body? This is the average power output of the defibrillator.‹P› =  _____ W What is the effective resistance of the body along the path that the current takes?Reff =  _____ Ω

The current in a wire at time t is given by the expression I(t) = (2.4 A) e−t/(2.3 µs), where t is in µs. a. Graph I vs t for the interval 0 ≤ t ≤ 10 μs. b. Find an expression for the total amount of charge that has entered the wire at time t if Q(0) = 0 C. c. Graph the total amount of charge that has entered the wire as a function of time for the same interval as in part a.

A current I flows through a resistor. A source maintains a potential difference of V across the resistor. The energy supplied by the source in time t is  A) V I t2 B) V I C) V I t D) V I/t

The statements in the following list all refer to a circuit consisting of a capacitor, initially charged by a battery, and a resistor. At time t = 0, the capacitor is discharged through the resistor by the closing of a switch. Check the boxes of the THREE TRUE statements. 01. The charge stored on the capacitor follows a similar variation with time to the variation of the current. 2. After 3 time constants, the power stored on the capacitor will have decayed by a factor of (1/e) 5. 3. The rate of decrease of charge stored on the capacitor will increase as the time increases. 4. The time constant has units of time and is equal to the time taken for the current to fall to 1/e of its final value. 5. A common form of capacitor is a cylindrical shape formed by rolling a metallic foil and a thin dielectric in a 'sandwich' into a cylindrical shape. 6. The quantity &, relative permittivity, is a measure of the factor by which the capacitance of a capacitor is increased by the introduction of a…

A capacitor that is initially uncharged is connected in series with a resistor and a 400.0 V emf source with negligible internal resistance. Just after the circuit is completed, the current through the resistor is 0.800 mA and the time constant for the circuit is 6.00 s. ▼ Part A What is the resistance of the resistor? Express your answer with the appropriate units. R = Submit Part B C = Value Submit What is the capacitance of the capacitor? Express your answer with the appropriate units. Request Answer 0 Value Units Request Answer Units ? ?

When unequal resistors are connected in parallel in a circuit, a the same current always runs through each resistor. b the potential drop is always the same across each resistor. c the largest resistance has the largest current through it. d the power generated in each resistor is the same.

In the circuit shown, the potential difference V₁ = VB = 41.0 V and the resistance R₁ = R₂ = R3 = R4 = 215 2. The arrows for currents IA and Iß indicate the direction of positive current flow. The arrows do not necessarily indicate the direction of the actual current flow at those points. Determine the current IA. IA = Determine the current IB. IB = A A RA www R₁ ww R₁ www R₁₁ www

Consider the following circuit diagram. The potential difference across the battery is 40.0 volts, and it supplies a current of 5.00 amperes to the circuit. There is a current of of 2.70 amperes flowing through R1. Resistor R2 has a resistance of 5.50 ohms. What is the resistance of R3? Answer in ohms to two decimal places, but do not include units in your answer.

A technician is attempting to determine the currents through each branch of the circuit in the figure below. The technician has assumed the currents are in the directions shown in the figure. The technician has found that the current I1 is 3.22 A and the values of  and R are unknown. A. What is the magnitude of the current I2 (in A)? B. A. What is the magnitude of the current I3 (in A)?

An electric current in a conductor varies with time according to the expression I(t) = 90 sin (90πt), where I is in amperes and t is in seconds. What is the total charge passing a given point in the conductor from t = 0 to t = 1/120 s? The charge is the integral of the current. C Need Help? Read It Watch It