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- Can all of die currents going into the junction shown below be positive? Explain.A sinusoidally varying potential difference has amplitude 170 V. (i) What is its minimum instantaneous value? (a) 170 V (b) 120 V (c) 0 (d) -120 V (e) -170 V (ii) What is its average value? (iii) What is its rms value? Choose from the same possibilities as in part (i) in each case.how do i solve the attached electronics and circuits proof question?
- 3) Suppose a current is given by the equation I=1.70sin(250t), where I is in amperes and t in seconds. Part A What is the frequency? Part B What is the rms value of the current? Part C If this is the current through a 24.0 Ω resistor, write the equation that describes the voltage as a function of time. a) V=(1/40.8)sin(250t) b) V=40.8sin(250t/2) c) V=40.8sin(250t) d) V=40.8sin(2⋅250t)An electronic apparatus may have large capacitors at high voltage in the power supply section, presenting a shock hazard even when the apparatus is switched off. A “bleeder resistor” is therefore placed across such a capacitor, as shown schematically in Figure, to bleed the charge from it after the apparatus is off. Why must the bleeder resistance be much greater than theeffective resistance of the rest of the circuit? How does this affect the time constant for discharging the capacitor?Answer the following circuitt by filling out all missing values.
- 94 . Consider the circuit below. (a) What is the initial current through resistor ?2 when the switch is closed? (b) What is the current through resistor ?2 when the capacitor is fully charged, long after the switch is closed? (c) What happens if the switch is opened after it has been closed for some time? (d) If the switch has been closed for a time period long enough for the capacitor to become fully charged, and then the switch is opened, how long before the current through resistor ?1 reaches half of its initial value? Please show all work using this. (Actual values, equations, and drawings)1. Select the correct statement: The sum of the voltages at a node is zero. The current in parallel resistors is always equal. The sum of the currents in a closed loop is zero. The sum of the sources of EMF and volt-drops in a closed loop is zero. 2. What is the potential difference of location "B" in the circuit compared to location "A".? (attached photo) ΔVAB = +16V ΔVAB = -2V ΔVAB = -22V ΔVAB = -16V1. a) For the circuit below, what is the terminal voltage of the battery? b) If resistor R is added in parallel to the circuit as shown, what is the effect on the terminal voltage? (increasing, no change, decreasing) c) Using principles of physics, explain the choice for b).
- 1.a. Which article of the National Electrical Code covers radio and television equipment?A. 770B. 517C. 810D. 7051.b. All _______-ampere receptacles for sensitive electronic equipment must be ground-fault circuitinterrupter protected.A. 10- and 30B. 10- and 15C. 20- and 30D. 15- and 20(II) A close inspection of an electric circuit reveals thata 480Ω resistor was inadvertently soldered in the placewhere a 350Ω resistor is needed. How can this be fixedwithout removing anything from the existing circuit?3. What is the potential difference across the 6.0 Ω resistor in the circuit shown? please hand write it or make it very clear to understand.