Physics Physics Practice Problems Solutions Library

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28 solutions

#### Q. Joe has rolled a long electrical extension cord into a coil of radius rc =11 cm with Nc = 16 loops. The coil of extension cord is initially lying h...

Solved • Feb 2, 2021

#### Q. Electromagnetic induction occurs in a coil when there is a change in ______.

Solved • Nov 2, 2020

#### Q. When a change occurs in the magnetic field in a closed loop of wirea. a voltage is induced in the wireb. a current is created in the loop of wirec....

Solved • Nov 2, 2020

#### Q. Patients undergoing an MRI occasionally report seeing flashes of light. Some practitioners assume that this results from electric stimulation of th...

Solved • Sep 30, 2020

#### Q. A (17cm X 17cm) square loop lies in the xy plane The magnetic field in this region of space is B = (0.31t i + 0.55t2 k)T where t is in seconds.1) W...

Solved • Sep 22, 2020

#### Q. A generator has a coil of wire rotating in a magnetic field. If the rotation rate increases, how is the maximum output voltage of the generator aff...

Solved • Jul 13, 2020

#### Q. The figure (Figure 1) shows the magnetic flux through a single-loop coil as a function of time.Part AWhat is the induced emf in the coil at t=0.050...

Solved • Jun 3, 2020

#### Q. Suppose that a 0.45 m-radius, 500-turn coil produces an average emf of 10700 V when rotated one-fourth of a revolution in 4.39 ms, starting from it...

Solved • May 26, 2020

#### Q. A _____ magnetic field can create an electric current.A. PerpendicularB. ChangingC. DipoleD. Strong

Solved • Apr 22, 2020

#### Q. You can switch the polarity of the bar magnet by clicking on the button with the bar magnet and two semi-circular arrows on the bottom right. Note ...

Solved • Apr 15, 2020

#### Q. Consider a situation with changing flux. Starting from the far left of the screen, move the magnet to the right so it goes through the middle of th...

Solved • Apr 15, 2020

#### Q. Consider a situation with changing flux. Starting from the far left of the screen, move the magnet to the right so it goes through the middle of th...

Solved • Apr 15, 2020

#### Q. Click on the button with two coils in it in the lower part of the window. The circuit should now have two sets of coils. Place the bar magnet insid...

Solved • Apr 15, 2020

#### Q. For which of the regions shown in the figure is the magnetic field the strongest?a) Region Ab) Region Cc) Region Bd) The observed effect is the sam...

Solved • Apr 8, 2020

#### Q. A circular loop of wire is positioned half in and half out of a square region of constant uniform magnetic field directed into the page (as shown i...

Solved • Mar 11, 2020

#### Q. A single piece of wire is bent into the shape of Texas, with a total area of 7.29 cm 2. This Texas shaped loop is perpendicular to a magnetic field...

Solved • Jun 26, 2017

#### Q. If the rate of change of the magnetic field applied to a loop of wire is doubled, what happens to the induced emf in that loop assuming all the oth...

Solved • Jun 20, 2017

#### Q. A flat square coil of wire with 15 turns and an area of 0.40 m 2 is placed with the plane of its area parallel to a magnetic field of 0.75 T. The c...

Solved • Apr 11, 2017

#### Q. A long, straight wire is running through the center of a coil of wire, with the normal of the coil aligned along the length of the wire. The coil h...

Solved • Mar 24, 2017

#### Q. A coil with 50 turns and a radius of 7 cm is placed in a 5 mT external magnetic field, ortiented such that the field is directed straight through t...

Solved • Mar 24, 2017

#### Q. A small circular loop of wire of radius 0.05 m and reisstance 1.0x10 -3 Ω is centered inside a large circular loop of wire of radius 0.5 m. The lar...

Solved • Mar 22, 2017

#### Q. A closely wound rectangular coil of 80 turns has dimensions of 25.0 cm by 40.0 cm. The plane of the coil is rotated from a position where it makes ...

Solved • Mar 22, 2017

#### Q. Consider a coil composed of ten loops of wire. Each loop has an area of 0.23. The coil has a very large resistance and is placed in a 0.047 tesla u...

Solved • Feb 28, 2017

#### Q. A loop of wire is placed inside a large solenoid so that the plane of the loop is perpendicular to the axis of the solenoid. To be clear, the loop ...

Solved • Feb 28, 2017

#### Q. A closed loop conductor with radius 2.0 m is located in a changing magnetic field. If the maximum emf induced in the loop is 7.0 V, what is the max...

Solved • Jan 11, 2017

#### Q. While a magnet is moved toward the end of a solenoid (as shown in the Figure below), a voltage difference is induced between the two ends of the so...

Solved • Jan 6, 2017