A flat square coil of wire with 15 turns and an area of 0.40…

A flat square coil of wire with 15 turns and an area of 0.40 m2 is placed with the plane of its area parallel to a magnetic field of 0.75 T.  The coil is flipped so its plane is perpendicular to the magnetic field in a time of 0.050 s.  What is the magnitude of the average induced emf in the coil?

A conducting rod whose length is ℓ = 25 cm is placed on a U-…

A conducting rod whose length is ℓ = 25 cm is placed on a U-shaped metal wire that is connected to a lightbulb having a resistance of 8.0 Ω as shown in the figure. The wire and the rod are in the plane of the page. A constant uniform magnetic field of strength 0.40 T is applied perpendicular to and out of the paper. An external applied force moves the rod to the left with a constant speed of 12 m/s. What are the magnitude of the induced current in the circuit?

A circular coil of radius 7.5 cm and resistance 0.45 Ω is pl…

A circular coil of radius 7.5 cm and resistance 0.45 Ω is placed in a uniform magnetic field perpendicular to the plane of the coil. The magnitude of the field changes with time according to B =(0.80 e-0.3t )T. What is the magnitude of the current induced in the coil at the time t = 2.0 s?