The component of the external magnetic field along the central axis of a 125 turn circular coil of radius 16.0 cm decreases from 2.40 T to 0.250 T in 3.10 s. If the resistance of the coil is R = 4.50 2, what is the magnitude of the induced current in the coil? magnitude: Incorrect What is the direction of the current the axial component of the field points away from the viewer? counter-clockwise clockwise

part a and b

A generator has a coil with 1260 turns that are each 0.020 m in diameter. The coil rotates at 3600 rpm in a 0.670 T magnetic field. If a 20.0 Ω resistive load is connected in parallel with the generator, what is the average power used by the load?   ____ W

Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field acting perpendicularly to its axis of rotation. Coil 1 has a radius of 4.6 cm and rotates in a 0.21-T field. Coil 2 rotates in a 0.54-T field. Each coil experiences the same maximum torque. What is the radius (in cm) of coil 2? Number i Units

A 1 kg horizontal aluminum bar, 0.1 m long, is pushed by a force F between two vertical metal rods that are 0.1 m apart. A 0.1T magnetic field is directed perpendicular to the plane of the rods as indicated. A 5 Q resistor is connected across the two rods at the bottom. What is the direction of the current through the aluminum bar? Aluminum bar

A bar magnet is let fall toward the center of a conducting loop of wire, with the north pole oriented downward. Viewed from the same side of the loop as the magnet, as the north pole approaches the loop, what is the direction of the induced current? Parallel to the length of the magnet. Counterclockwise Clockwise zero

The figure below shows a 117-turn square coil rotating about a vertical axis at at w = 1,460 rev/min. The length of a side of the coil is 20.0 cm. The horizontal component of the Earth's magnetic field at the coil's location is equal to 2.00 x 10-5 T. 20.0 cm 20.0 cm (a) What is the magnitude of the maximum emf (in mV) induced in the coil by the Earth's magnetic field? mV (b) What is the orientation of the coil with respect to the magnetic field when the maximum emf occurs? The plane of the coil is oriented 45° with respect to the magnetic field. O The plane of the coil is parallel to the magnetic field. The plane of the coil is perpendicular to the magnetic field.

A 40-loop circular coil has a radius of 5.0 cm. It is placed in a magnetic field so that the field lines from a permanent magnet (B) make 60o angle with the plane-area of the coil. If the magnet is brought toward the loop so its magnetic field varies from 0.1 T to 0.35 T in 2 microsecond, the induced magnetic field is Group of answer choices 3.40 x 1011 V 3.40 x 104 V 4.1 x 1014 V 2.0 x 106 V

A 100-turn square coil of side 20.0 cm rotates about a vertical axis at 1.6 x10 rev/min as indicated in the figure. The horizontal component of the Earth's magnetic field at the coil's location is equal to 2.00 x 10T. Calculate the maximum emf induced ( in units of mV) in the coil by this field. 20.0 cm 20.0 cm

QUESTION 1 A coil of ten turns of area 0.01 m2 and resistance 5 Q is placed perpendicularly inside a magnetic field whose intensity and direction changes as given in the figure. What is the magnitude of the flux of magnetic field crossing the area of the coil at time = 6 sec? B(T) 0.1 0.3 0.5 0.8 0.9 t(s) -1 -2 O 2 Wb O 0.2 Wb O 20 Wb O 0.02 Wb O none of these