An elastic conducting material is stretched into a circular loop of 12.6 cm radius. It is placed with its plane perpendicular to a uniform 1.17 T magnetic field. When released, the radius of the loop starts to shrink at an instantaneous rate of 57.9 cm/s. What emf is induced in volts in the loop at that instant? Number i Units

A conducting wire shaped in a “U shape” is connected to a  5 ohm light bulb.The 0.8 T external magnetic field is directed into the page as shown.  A conducting bar of length 1.2 m is sliding on the conducting  wire at 2 m/s to the right. What is the induced emf? Hint:  the induced emf is the negative of the change in magnetic flux. The magnetic flux changes because the area of the U shaped wire placed in the magnetic field changes when the conducting wire slides to the right.  Induced emf <=>   emf = -N ∆Φ/∆t∆Φ =∆(BA)= B ∆A =B  ( Af-Ai) Group of answer choices A) 1.92 V B) 0.8 V C) 2.4 V D) 6.8 V   Please show how you solved the question and provide explanations. I am struggling in this section of physics, so I greatly appreciate your guidance.

A circular loop of wire has its radius shrink from 3 m to 1.5 m over 5 seconds. The area vector of the wire stays parallel with a magnetic field of magnitude 4 μT. What is the induced emf? 0 V 3.77e-6 V 0.94 V 1.70e-5 V

1. A conducting loop of arca A and resistance R lics at right angles to a spatially uniform magnetic field. At time t = 0, the magnetic field and loop current are both zero. Subsequently, the current increases according to I (t) = bt², where b is a constant with units A/s?. Find an expression for the magnetic field strength as a function of time.

In each of two coils the rate of change of the magnetic flux in a single loop is the same. The emf induced in coil 1, which has 245 loops, is 2.51 V. The emf induced in coil 2 is 4.90 V. How many loops does coil 2 have? Number i Units

A 2.00×10-2 Ω square wire loop 40.0 cm on a side has its plane normal to a uniform magnetic field of magnitude B = 3.0 T. If you pull two opposite sides of the loop away from each other, the other two sides automatically draw toward each other, reducing the area enclosed by the loop.If the area is reduced to zero in a time of 0.30 s what is the average emf during this time interval?  What is the average current during this time interval?

a flat circular coil with 150 turns, a radius of 6.00 * 10^-2 m, and a resistance of 0.30 is exposed to an external magnetic feild that is directed perpendicular to the plane of the coil. the magnitude of the external magnetic feild is changing with time at a rate of 0.80 T/s.  a. find the magnitude of the induced current.  b. find the magnitude of the induced magnetic feild B(induced) at the center of the coil.

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A conducting bar sits on top of two parallel rails. A uniform magnetic field B is steady and directed to the right. The bar moves upward with velocity v. What is the polarity of the induced emf in terminals X and Y? X Y O X and Y are at the same potential. X is positive and Y is negative. O Y is positive and X is negative. 1-1

Suppose the 50 turn coil in the figure below lies in the plane of the page and originally has an area of 0.230 m². It is stretched to have no area in 0.100 s. X Bin XBin X V What is the direction? clockwise X counterclockwise X X What is the magnitude (in V) of the average value of the induced emf if the uniform magnetic field points into the page and has a strength of 1.75 T? X X 192 X