Question

In: Physics

Prelab 7: DC Circuits 1 What are the units of Resistance? Watch the video tutorial about...

Prelab 7: DC Circuits 1

What are the units of Resistance?

Watch the video tutorial about series and parallel circuits. Explain what ammeters and voltmeters do – Why are they hooked up to the circuit differently, and why don't they affect the circuit?

What is the resistance of a resistor when the colored bands read yellow, red, green and gold ?

What is a thermistor?

Three resistors with values of 1,488 Ohms, 1,101 Ohms and 860 Ohms are in parallel with each other in a circuit. What is the equivalent resistance of this parallel circuit?

Expert Solution

Units of resistance is ohm.

An ammeter is a low resistance galvanometer.It is used to measure the current in amperes.To measure the current of a circuit , the ammeter is connected in series to the circuit so that the current to be measured must pass through it.Since, the resistance of ammeter is low, so it's inclusion in series in the circuit does not change the resistance and hence the main current in the circuit.

A voltmeter is a high resistance galvanometer.It is used to measure potential difference between 2 points of the circuit in volts.To measure the potential difference between the 2 points of a circuit, the voltmeter is connected in parallel to the circuit.The voltmeter resistance being high, it draws minimum current from the main circuit and the potential difference to be measured is not affected materially.

The resistance of carbon resistor will be 425%.

A thermistor is a heat sensitive Device whose resistivity changes very rapidly with change of temperature.The temperature coefficient of resistance of a thermistor is very high, which may be positive or negative.

The equivalent resistance Will be

1/R =1/1488 + 1/1101 + 1/860.

Therefore R=364.5 ohm

genius_generous answered 4 months ago

Physics Prelab: Magnetism Watch the video on magnetism. Explain how the “two” right hand rules works...

Physics Prelab: Magnetism Watch the video on magnetism. Explain how the “two” right hand rules works –what does each indicate? How do magnetic fields get their start - what causes magnetic fields? What is the force a magnetic field exerts on a charged particle? Write down the equation and explain the direction. Explain how a solenoid works - how does it produce a magnetic field? What are the five major types of magnetic materials? Describe each briefly.

Read about the Flixborough disaster that occurred in 1974 ( or watch a video about it...

Read about the Flixborough disaster that occurred in 1974 ( or watch a video about it on youtube). What was the cause of the accident and what safety lessons are to be learnt from this disaster? (Write no more than 250 words).

(1) Trophic Cascades in theSerengeti. Watch Dr. Cox's video on "What Rinderpest eradication taught us about...

(1) Trophic Cascades in theSerengeti. Watch Dr. Cox's video on "What Rinderpest eradication taught us about the Serengeti", which can be found in the Instructor Insights folder for this week. Then address the following questions: (a) How did eradication of Rinderpest from East Africa increase both the tree and giraffe populations in the Serengeti? (b) How did eradication of Rinderpest from East Africa increase the population of predator species in the Serengeti? (c) What does this tell us about ecosystems?...

Watch the following video about the way the field of physics can be separated into subfields:...

Watch the following video about the way the field of physics can be separated into subfields: https://www.youtube.com/watch?v=ZihywtixUYo Write a 5-7 sentence reflection on the information presented in the video. link: https://www.youtube.com/watch?v=ZihywtixUYo

Session 7: Video Discussion Watch Video Medical Tourism Marketing: Destination Branding Duration: 2:09 User: n/a -...

Session 7: Video Discussion Watch Video Medical Tourism Marketing: Destination Branding Duration: 2:09 User: n/a - Added: 9/16/13 Discussion Question: After watching the video, identify your reactions to the lessons you just learned. Provide a substantive response using a real world example, and relate your answer to a concept you learned from your text.

(1) Covert a Hexadecimal to decimal (there is a video for you to watch too). Then...

(1) Covert a Hexadecimal to decimal (there is a video for you to watch too). Then write a program that can convert a binary to decimal (only for integer case). a) Directly use Java built-in method to do this. In this case, only couple lines of code. Hint: Study Integer class in Java. b) Write your own code to convert a binary to decimal from scratch. The input is a binary string. The program output is its corresponding decimal value....

Watch this video about Joseph Shumpeter's concept of Creative Destruction. For example, many think that the...

Watch this video about Joseph Shumpeter's concept of Creative Destruction. For example, many think that the introduction of self-driving cars will disrupt the job market for drivers. Discuss in 500 words your opinion on what you think of the disruptive capacity of the gig economy on the labor market. Include at least 3 quotes enclosed in quotation marks and cited in-line by reference to a list at the end. Reply to two peer postings in paragraphs of at least five...

Watch The Responsive Brain (you will have to scroll down to find the video). It's about...

Watch The Responsive Brain (you will have to scroll down to find the video). It's about 30 minutes, but you are only required to watch the first 9:30 (you can end at Excerpts from Grief and Peril in Infancy) and then skip to 21:57 (the African plain scene) and watch to the end. Please review the study on the impact of human touch on premature infants in intensive care. What was the hypothesis? What was the IV? What was the...

Session 1: Video Discussion Watch Video The Do's and Don'ts in a Professional Workplace Duration: 4:12...

Session 1: Video Discussion Watch Video The Do's and Don'ts in a Professional Workplace Duration: 4:12 User: n/a - Added: 4/13/11 Discussion Question: After watching the video, identify your reactions to the lessons you just learned. Provide a substantive response using a real world example, and relate your answer to a concept you learned from your text.

For this 1-2 page assignment, you are going to watch the video of a speech and...

For this 1-2 page assignment, you are going to watch the video of a speech and write a peer review as if the speaker would get the feedback from you in written form. In the review please address the following aspects of the speech, giving clear examples from the speech and then critique the student’s performance. At least three aspects of delivery At least two aspects of content Was the speech effective? Student Speeches for Analysis