Question

In: Physics

1. In the demonstration where a magnet is brought near a loop, what determines the induced...

1. In the demonstration where a magnet is brought near a loop, what determines the induced current?

the strength of the magnetic field intercepted by the loop
the rate at which the number of magnetic field lines intercepted by the loop changes
the spacing of the magnetic field lines intercepted by the loop

the number of magnetic field lines intercepted by the loop

2.

Which describes the flux of a magnetic field that is tangent to a section on a closed surface?

The flux is zero.
The flux is negative.
The flux is positive.

3. Which is true about the emf induced in a loop by a magnet?

It is equal to the inverse of the magnetic flux through the loop.
It is equal to the inverse of the rate at which the magnetic flux through the loop changes.
It is equal to the rate at which the magnetic flux through the loop changes.
It is equal to the magnetic flux through the loop.

4. When the magnetic flux through a loop increases, which is true about the induced current?

It produces a magnetic field in the direction opposite the existing magnetic field.
It produces a magnetic field but the direction depends on the rate at which the existing field changes.
It produces a magnetic field in the same direction as the existing magnetic field.

5. In the demonstration where a loop is pulled out of a magnetic field at constant speed, which is true about the power of your force?

It is less than the power of dissipation by the current.
It is greater than the power of dissipation by the current.
It is equal to the power of dissipation by the current.

Solutions

Expert Solution

1) the rate at which magnetic field lines intercepted by the loopchanges because Current will induced when there is change in magnetic flux.. Other wise current will not induce how much and how many field lines will cross-OPTION(2) is correct

2) the flux is zero because Magnetic field lines are tangent to surface which means they are not perpendicular. Further which means the Magnetic field lines are not passing through the closed surface -OPTION (1) is correct

3) By Faraday law induced end depends upon the rate at the which magnetic flux through the Loop Changes.. OPTION (3) is correct

4) By lenz the direction of induced current will take place in such a way that it will oppose the Reason behind the Change in magnetic Flux.. Therefore It will create a Magnetic field a in opposite direction to Decrease the flux.. OPTION (1) is correct

5) By the law of conservation of energy the power we used to Pull out the loop from Magnetic field is equal to power of dissipation from current.. In order to oppose us.. So we can't take the Loop back from Magnetic Field.. OPTION (3) is correct

genius_generous answered 2 years ago
Next > < Previous

Related Solutions

1) A magnet is dropped vertically through a horizontal loop of wire, with the south pole...
1) A magnet is dropped vertically through a horizontal loop of wire, with the south pole of the magnet pointing downward. Describe the induced current in the loop, as viewed from above the loop. A)Counterclockwise as the magnet approaches, then clockwise after it passes through B)Clockwise as the magnet approaches, then counterclockwise after it passes through C)Counterclockwise always D)Clockwise always 2) When current flows into a resistor in a circuit, what is actually happening to the individual electrons? A)They slow...
1/ a) What determines whether you should use a loop or recursion when you are writing...
1/ a) What determines whether you should use a loop or recursion when you are writing an algorithm for a tree, and why does it matter? b) Why did we put Head and Tail nodes in our List class?
My physics class did an online lab thing where a charged plastic rod is brought near...
My physics class did an online lab thing where a charged plastic rod is brought near a magnetic and non-magnetic conduction rod about the same size. Both ends of the magnet and the non-magnetic rod were attracted to the charged rod. I am a little confused and what forces/ different forces are causing this Question: If the charged rod is attracted to the magnetic and the non-magnetic rod in the same way, can you conclude that there are any special...
1) a negatively charged rod is brought near a second rod that is neutral and suspended...
1) a negatively charged rod is brought near a second rod that is neutral and suspended from a non conducting spring. The second rod begins to move toward the negative rod, showing attraction of the two rods. after the first rod is removed, the second rod... a) has no net charge. b) has a positive net charge. c) has a negative net charge. d) is polarized with one positive and one negative end 2) An isolated solid metal sphere that...
When a magnet is plunged into a coil at speed v, as shown in the figure, a voltage is induced in the coil and a current flows in the circuit.(Figure 1)
When a magnet is plunged into a coil at speed v, as shown in the figure, a voltage is induced in the coil and a current flows in the circuit. (Figure 1) Part A If the speed of the magnet is doubled, the induced voltage is ________. a.) twice as great b.) four times as great c.) half as great d.) unchanged  
When a magnet is plunged into a coil at speed v, as shown in the figure, a voltage is induced in the coil and a current flows in the circuit.(Figure 1)
When a magnet is plunged into a coil at speed v, as shown in the figure, a voltage is induced in the coil and a current flows in the circuit. (Figure 1) Part A If the speed of the magnet is doubled, the induced voltage is ________. a.) twice as great b.) four times as great c.) half as great d.) unchanged  
a. Describe what happens to an uncharged conductor when a positive charge is brought near. Explain...
a. Describe what happens to an uncharged conductor when a positive charge is brought near. Explain any forces that are exerted on the conductor. A sketch or drawing may be helpful. b. Describe what happens to an uncharged insulator when a positive charge is brought near. Explain any (net) forces that are exerted on the insulator. A sketch or drawing may be helpful.
Find a loop invariant (I) for the following while loop with the post-condition {Q: S=1}, where...
Find a loop invariant (I) for the following while loop with the post-condition {Q: S=1}, where S is an integer and the operator / represents an integer division. Show your work step by step to receive full credit. while (S > 1) do S = S / 2; }
1.a) Explain what determines the value of a company’s stock and what determines a credit quality?...
1.a) Explain what determines the value of a company’s stock and what determines a credit quality? b) What is the best way to appreciate the interrelatedness of the income statement, the balance and the statement of cash flows? 2. What are some of the limitations of financial statement analysis highlighted by Enron’s success in sustaining its fraud over a long period? b) What role did the SOX Act provision play in the HealthSouth fraud? 3. Discuss the reasoning behind Scrushy’s...
Human Resource management subject Circle the ONE best answer. 1. What HR activity determines what, where,...
Human Resource management subject Circle the ONE best answer. 1. What HR activity determines what, where, when, and how work tasks are done? a. defining and designing work b. human resource planning c. recruitment and selection d. employee relations 2. What HR activity provides the resources to assist employees in developing the necessary knowledge and skills to do their jobs today and in the future? a. job descriptions and design b. human resource planning c. training and development d. strategic...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT