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.

Determine the magnetic induction at point A in the figure for the conductor of electric current shown in the figure (uo = 4π x 10 -7 T x m / A).

An emf is induced by rotating a 1000-turn, 20.0 cm diameter coil in the Earth's 5.00 x 10-5T magnetic field. What average emf is induced, given the plane of the coil is originally perpendicular to the Earth's field and is rotated to be parallel to the field in 10.0 ms?

Determine the magnetic induction at point A in the figure for the conductor of electric current shown in the figure (uo = 4π x 10 -7 T x m / A).

A 65-turn square coil constructed from aluminum wire is placed in a uniform 1.50-T magnetic field with the plane of the coil making an angle of 45.0° with the field direction. During the next 49.0 ms, the magnitude of the field is reduced to 0.300 T, resulting in an induced emf in the coil with magnitude 1.45 V. What is the total length of aluminum wire used to construct the coil? m

When a coil is placed in a magnetic field, the coil's normal to the plane stays parallel to the field. Which of the following choices results to the average emf induced in the coil to have the greatest magnitude?   a.The magnitude of the magnetic field is large, and it does not change b.The magnitude of the magnetic field is large, and its rate of change is small c.The magnitude of the magnetic field is small, and its rate of change is small d.The magnitude of the magnetic field is small, and its rate of change is large

plane of the coil is and (b) horizontal? A coil consisting of 10 turns of wire each in an area of 0.025 m² is rotating in a magnetic. 7. field that is decreasing at the rate of 0.32 T/s. What is the emf induced in the coil? The armature of a generator consists of 5 circular coils with radius 1.5 cm. The coils rotate in a constant magnetic field of 1.25 T. What must be the angular speed and frequency of rotation to produce a maximum voltage of 2.5 V? 8.