In Fig. 19–38, what turns ratio, $\dfrac{\text{N}_\text{P}}{\text{N}_\text{s}}$, is required to obtain a secondary voltage of a. $60\text{ Vac}$? b. $600\text{ Vac}$? c. $420\text{ Vac}$? d. $24\text{ Vac}$? e. $12.6\text{ Vac}$?

Operating a vehicle in the state of Florida is considered as giving legal consent to __.

Calculate the capacitance, $C$, of a capacitor for each set of physical characteristics listed. a. $A=0.1\text{ cm}^2$, $d=0.005\text{ cm}$, $K_\epsilon=1$. b. $A=0.05\text{ cm}^2$, $d=0.001\text{ cm}$, $K_\epsilon=500$. c. $A=0.1\text{ cm}^2$, $d=1\times10^{-5}\text{ cm}$, $K_\epsilon=50$. d. $A=1\text{ cm}^2$, $d=5\times10^{-6}\text{ cm}$, $K_\epsilon=6$.

How much charge, $Q$, is stored by a $0.05\text{-}\mu\text{F}$ capacitor if the voltage across the plates equals a. $10\text{ V}$? b. $40\text{ V}$? c. $300\text{ V}$? d. $500\text{ V}$? e. $1\text{ kV}$?

In Fig. 19–37, solve for a. the turns ratio $\dfrac{\text{N}_\text{P}}{\text{N}_\text{s}}$. b. the secondary current, $I_\text{S}$. c. the primary current, $I_\text{P}$.

What is the frequency, $f$, of a sine wave that completes a. $10$ cycles per second? b. $500$ cycles per second? c. $50,000$ cycles per second? d. $2,000,000$ cycles per second?

If the sine wave in Fig. 15–29 has an rms value of $40\text{ V}$, then calculate a. the peak value. b. the peak-to-peak value. c. the average value.

If the sine wave in Fig. 15–29 has a peak value of $15\text{ V}$, then calculate a. the peak-to-peak value. b. the rms value. c. the average value.

The peak value of a sine wave equals $100\text{ mV}$. Calculate the instantaneous voltage of the sine wave for the phase angles listed. a. $15^{\circ}$. b. $50^{\circ}$. c. $90^{\circ}$. d. $150^{\circ}$. e. $180^{\circ}$. f. $240^{\circ}$. g. $330^{\circ}$.

In Fig. 19–35, solve for a. the secondary voltage, $V_\text{S}$. b. the secondary current, $I_\text{S}$. c. the secondary power, $P_\text{sec}$. d. the primary power,$P_\text{pri}$. e. the primary current, $I_\text{P}$.

In Fig. 18–13, solve for a. the resistor voltage, $V_\text{R}$. b. the capacitor voltage, $V_\text{C}$. c. the total voltage, $V_\text{T}$.

The resistor is decreased until the LED current equals $13 \mathrm{~mA}$. What is the value of the resistance?

If the resistor is decreased to $1 \mathrm{k} \Omega$, what is the LED current?

If the supply voltage increases to $40 \mathrm{~V}$, what is the LED current?