g) Fill out the table for the circuit diagramed at the right. Current Resistance Voltage (V) Circuit Power (W) (2) R2 R3 Position (A) 1 10.0 20.0 3 30.0 Total 6.00 h) Is there a relationship between resistance and voltage drop in a series circuit? If so, state it.

g) Fill out the table for the circuit diagramed at the right. Current Resistance Voltage (V) Circuit Power (W) (2) R2 R3 Position (A) 1 10.0 20.0 3 30.0 Total 6.00 h) Is there a relationship between resistance and voltage drop in a series circuit? If so, state it.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter21: Circuits And Dc Instruments

Section: Chapter Questions

Problem 53PE: A 1,00-?O voltmeter is placed in parallel with a 75.0kresistor in a circuit, (a) Draw a circuit...

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Consider a circuit that consists of a real battery with an emf and an internal resistance of r connected to a variable resistor R. (a) In order for the terminal voltage of the battery to be equal to the emf of the battery, what should the resistance of the variable resistor be adjusted to? (b) In older to get the maximum current from the battery, what should the resistance variable resistor be adjusted to? (c) In order for the maximum power output of the battery to be reached, what should the resistance of the variable resistor be set to?
Consider the circuits shown below, (a) What is the current through each resistor in part (a)? (b) What is the current through each resistor in part (b)? (c) What is the power dissipated or consumed by each circuit? (d) What is the power supplied to each circuit?
An automobile starter motor has an equivalent resistance of 0.0500 and is supplied by a 12.0-V battery with a 0.0100- internal resistance, (a) What is thecurrent to the motor? (b) What voltage is applied to it? (c) What power is supplied to the motor? (d) Repeat these calculations for when the battery connections are corroded and add 0.0900 to the circuit. (Significant problems are caused by even small amounts of unwanted resistance in low-voltage, high-current applications.)
A 1,00-?O voltmeter is placed in parallel with a 75.0kresistor in a circuit, (a) Draw a circuit diagram of the connection, (b) What is the resistance of the combination? If the voltage across the combination is kept the same as it was across the 75.0-kresistor alone, what is the percent increase in current? (d) If the current through the combination is kept the same as it was through the 75.0-kresistor alone, what is the percentage decrease in voltage? (e) Are the changes found in parts (c) and (d) significant? Discuss.
A person with body resistance between his hands of 1.00 k accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) (a) Draw a circuit diagram to represent the situation. (b) If the internal resistance of the power supply is 2000 , what is the current through his body? (c) What is the power dissipated in his body? (d) If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in this situation to be 1.00 mA or less? (e) Will this modification compromise the effectiveness of the power supply for driving low-re si stance devices? Explain your reasoning,
1. Please draw a circuit diagram for a 15 V battery that is in series with a 5-ohm resistor, has an open switch, and a .75 uF capacotir. Then find the circuit's time constant in us. 2. Find the initial curent when the swith is closed at t=0s and use the initial current plue the time constant to create a mathematical expression for the current as a function of time, I(t). Please include a drawing of I(t) from t=0 to t=5 RC 3. Use the expression you created in 2 to find the current at t=.010ms 4. Find the charge Q on the capacitor plates when they are fully charged. Write another mathematical expression for the capactitor charge as a function of time using the charge Q plus the time constant. Include a drawing of Q(t) from t=0 to t=5RC. 5. Use the expression you created in 4 to find voltage across the capacitor plates at t=.010ms. (just the last two)
1. Please draw a circuit diagram for a 15 V battery that is in series with a 5-ohm resistor, has an open switch, and a .75 uF capacotir. Then find the circuit's time constant in us. 2. Find the initial curent when the swith is closed at t=0s and use the initial current plue the time constant to create a mathematical expression for the current as a function of time, I(t). Please include a drawing of I(t) from t=0 to t=5 RC 3. Use the expression you created in 2 to find the current at t=.010ms 4. Find the charge Q on the capacitor plates when they are fully charged. Write another mathematical expression for the capactitor charge as a function of time using the charge Q plus the time constant. Include a drawing of Q(t) from t=0 to t=5RC. 5. Use the expression you created in 4 to find voltage across the capacitor plates at t=.010ms. (just the first three)
2. a) What is the total resistance of the circuit? b) What is the current through the 100 Ω resistor? c) What is the power dissipated in the 100 Ω resistor? please hand write it or make it very clear to understand
3.A. How is the current of Resistor 1 (R1) effected as more resistors, Resistors R2 and R3, are added in series to it? Give answer and reasoning in 2-3 well written sentences B. How is equivalent resistance of a circuit affected as resistors are added in series? Can you identify a mathematical equation that describes the equivalent resistance of a circuit containing only resistors in series? Give your answer in 2-3 well written sentences as well as the equation for equivalent resistance for resistors in series.
Regarding the circuit in the left-hand part of the diagram: a) What is the current passing through each of the resistors? b) What is the current supplied by the battery? c) What is the potential difference across the 12 Ω resistor? d) How much power is turned to heat in the 4 Ω resistor? e) If we replace the circuit on the left by the one in the right-hand part of the diagram, with the same battery and only one resistor, what resistance Req should we choose to obtain the same total current?
1. Please derive the charge on a capacitor as function of time q(t) = q0*e-t/RC and the current in the circuit as function of time i(t)=(V0/R)*e-t/RC by solving the differential equation constructed with Kirchhoff's second rule after analyzing a charged RC circuit without connected to battery. 2. Please derive the unit of τ=RC using both the units of resistor and capacitor and explain the meaning of τ.
A person with body resistance between his hands of 10.0 k Ω accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) (a) Draw a circuit diagram to represent the situation.(b) If the internal resistance of the power supply is 2000 Ω , what is the current through his body? (c) What is the power dissipated in his body? (d) If the power supply is to be made safe by increasing its internalresistance, what should the internal resistance be for the maximum current in this situation to be 1.00 mA or less? (e) Will this modification compromise the effectiveness of thepower supply for driving low-resistance devices? Explain yourreasoning.