Homework Answers
Add Answer to:
In most circuits the resistance of wires is negligible. Over long distances, however, it can become...
A circuit consists of a 3-volt battery; connecting wires with very low resistivity; a light bulb...
A circuit consists of a 3-volt battery; connecting wires with very low resistivity; a light bulb with resistance = 2Ω. a. How much current is flowing through the bulb? b. How much energy per second is converted from electrical potential energy to light and heat? c. If the bulb is replaced with one with higher resistance, in what way (increase, decrease, stay the same) would voltage and current change?
EM 98 A model for circuits Part 1: Current and resistance C. Light a bulb using...
EM 98 A model for circuits Part 1: Current and resistance C. Light a bulb using a battery and a single wire. Observe and record the behavior (ie., brightness) of the bulb when objects made out of various materials are inserted into the circuit. (Try materials such as paper, coins, pencil lead, eraser. your finger, etc.) What is similar about most of the objects that let the bulb light? D. Carefully examine a bulb. Two wires extend from the filament...
Part 1 Before we can consider the effects it might have, we must consider the high...
Part 1 Before we can consider the effects it might have, we must consider the high tension power line itself. Such wires are frequently constructed by twisting aluminum or copper wires together into a large flexible bundle. Consider such a copper cable with a diameter of 4 cm. If this cable is 10 km long, what is its resistance? Remember: Resistance = Resistivity * Length / Area Resistivity of copper is 0.0000000168 Ω-m Cross sectional Area of...
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the...
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the power, I*V, is increased? Consult your data table. Does the temperature of the light bulb filament increase, decrease or remain constant as c. the power, IV, to the bulb is increased? (Hint: Associate a higher electrical power with 3. Does the diode conduct symmetrically when the current flows in the forward (positive 4. Why is it that we always connect a voltmeter in parallel...
2. (1) Consider the circuit in part B. Ignore the resistance of batteries, wires, and the...
2. (1) Consider the circuit in part B. Ignore the resistance of batteries, wires, and the switch. How would the following physical quantities change over time after the switch is closed? a. current b. voltage across the light bulb Vb c. voltage across the capacitor Vc d. Vb+Vc 3. (1) Imagine repeating the timing experiments starting with a partially-charged capacitor. Is the time the bulb staying lit longer or shorter? Explain why.
In the following circuits, all four light bulbs are identical. a. which circuit has the larger...
In the following circuits, all four light bulbs are identical. a. which circuit has the larger voltage drop across each bulb? b. Which circuit has the lower equivalent resistance? c. Which circuit draws the greater current from the voltage sources? d. Which circuit has brighter bulbs based on your answers to a and c?
2.[1pt Electrical power is typically transmitted over long distances at very high voltage, up to 1000...
2.[1pt Electrical power is typically transmitted over long distances at very high voltage, up to 1000 kV (for reasons that we will explore in the next problem). Suppose that bird a lands on a power line carrying 2690A, as seen in the figure below If the line has 3.08x10Ohm resistance per meter and the bird's feet are 3.60cm apart, what is the magnitude of the potential difference between the bird's feet? Answer: Incorrect, tries 2/6 Hint: Simple enough to calculate...
Pre-lab Assignment Experiment 21-A Simple Electrical Circuits 1. (2 pts) Capacitors need to be treated with...
Pre-lab Assignment Experiment 21-A Simple Electrical Circuits 1. (2 pts) Capacitors need to be treated with a little bit of respect and used carefully. What are two things mentioned in the lab about which you should be careful when using capacitors? 2. Suppose a light bulb is rated for a voltage of 1.8 V. At this voltage it draws a current of 0.054 A. a. (1 pt) Using Ohm’s Law, determine the resistance of the bulb. Show your work. b....
A Investigation #11: Non-Identical Bulbs in Series and Parallel All of the circuits you have investigated...
A Investigation #11: Non-Identical Bulbs in Series and Parallel All of the circuits you have investigated so far have involved identical bulbs. If two bulbs are identical and one bulb is brighter, then the brighter bulb must have a larger current thru it. Furthermore, the larger current must be caused by a larger potential difference. In this investigation, you will study circuits for which the bulbs are not identical. We will illustrate that two Spherical bulbs are not identical by...
1. In class we derived how a transformer can up or downregulate the voltage in an...
1. In class we derived how a transformer can up or downregulate
the voltage in an electrical circuit with an alternating
current.
(a) Use the conservation of energy to deduce how the currents I1
and I2 must be related if you know the ratio of ε1/ε2 (for the
purpose of calculating the power delivered by a circuit ignore any
complications due to the fact that I(t) and ε(t) are
time-varying).
(b) In class I argued that power transmission is more...
EM 98 A model for circuits Part 1: Current and resistance C. Light a bulb using a battery and a single wire. Observe and record the behavior (ie., brightness) of the bulb when objects made out of various materials are inserted into the circuit. (Try materials such as paper, coins, pencil lead, eraser. your finger, etc.) What is similar about most of the objects that let the bulb light? D. Carefully examine a bulb. Two wires extend from the filament...
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the power, I*V, is increased? Consult your data table. Does the temperature of the light bulb filament increase, decrease or remain constant as c. the power, IV, to the bulb is increased? (Hint: Associate a higher electrical power with 3. Does the diode conduct symmetrically when the current flows in the forward (positive 4. Why is it that we always connect a voltmeter in parallel...
In the following circuits, all four light bulbs are identical. a. which circuit has the larger voltage drop across each bulb? b. Which circuit has the lower equivalent resistance? c. Which circuit draws the greater current from the voltage sources? d. Which circuit has brighter bulbs based on your answers to a and c?
2.[1pt Electrical power is typically transmitted over long distances at very high voltage, up to 1000 kV (for reasons that we will explore in the next problem). Suppose that bird a lands on a power line carrying 2690A, as seen in the figure below If the line has 3.08x10Ohm resistance per meter and the bird's feet are 3.60cm apart, what is the magnitude of the potential difference between the bird's feet? Answer: Incorrect, tries 2/6 Hint: Simple enough to calculate...
A Investigation #11: Non-Identical Bulbs in Series and Parallel All of the circuits you have investigated so far have involved identical bulbs. If two bulbs are identical and one bulb is brighter, then the brighter bulb must have a larger current thru it. Furthermore, the larger current must be caused by a larger potential difference. In this investigation, you will study circuits for which the bulbs are not identical. We will illustrate that two Spherical bulbs are not identical by...
1. In class we derived how a transformer can up or downregulate
the voltage in an electrical circuit with an alternating
current.
(a) Use the conservation of energy to deduce how the currents I1
and I2 must be related if you know the ratio of ε1/ε2 (for the
purpose of calculating the power delivered by a circuit ignore any
complications due to the fact that I(t) and ε(t) are
time-varying).
(b) In class I argued that power transmission is more...
Most questions answered within 3 hours.
-
A coach uses a new technique to train gymnasts. Seven
gymnasts were randomly selected and their...
asked 45 minutes ago -
While rotating the tires on your car you notice a rock [mass =
0.1 Kg] stuck...
asked 2 hours ago -
Using MARS simulator, write MIPS programs according to
the following scenarios: Receive a positive integer number...
asked 4 hours ago -
An object in front of a concave mirror has a real image that is
11.5 cm...
asked 4 hours ago -
Consider the reaction, C3 H8 + O2 --> CO2 + H2O. How many
moles of O2...
asked 6 hours ago -
You and your opponent both roll a fair die. If you both roll the
same number,...
asked 6 hours ago -
In a study of the accuracy of fast food drive-through orders,
Restaurant A had 257 accurate...
asked 6 hours ago -
Identify and describe in detail the four categories of
institutions that could be included in a...
asked 6 hours ago -
In python
class Customer:
def __init__(self, customer_id, last_name, first_name, phone_number, address):
self._customer_id = int(customer_id)
self._last_name =...
asked 7 hours ago -
What is an example of a limitation in implementing a new
ERP system and how it...
asked 6 hours ago -
In a section of 9.7cm of an artery with a radius of 2.6mm there
is a...
asked 7 hours ago -
the two carboxylic acid groups of aspartic acid have different
acidities with pKa values of 2.1...
asked 7 hours ago