A citizen’s band radio transmitter operates at a frequency of 27.1 MHz. The peak voltage across the transmitter is 10-V. Write an expression for the variation of voltage with time. What is the time for one cycle? use the formula V=Vo sin (2πft)

Problem 4: The charge on a capacitor in a circuit is given by q(t) = qmax cos(wt + q) Enter an expression for the current flowing into the capacitor as a function of time. I(t) = 1

3.1 A wire of diameter d, length l and resistivity ρ forms a circular loop. A current entersand leaves the loop at points P and Q as shown in the Figure. Show that the resistance R ofthe wire is given by the expression (4) R = 4ρx(l − x) / π*d^2*l

The capacitor in the circuit shown is fully charged by a 24 V battery. The switch is closed at t = 0. At sometime after the switch is closed, the voltage across the capacitor is measured to be 10 V. What is the current in the circuit at this time, in Ampere? C = 3.0 µF, and R = 2.0 02. Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. Cil