4. [-/1 Points] DETAILS SERPSE10 30.1.OP.003. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 31-turn circular coil of wire has diameter 1.02 m. It is placed with its axis along the direction of the Earth's magnetic field of 52.0 HT and then in 0.200 s is flipped 180. An average emf of what magnitude is generated in the coil? mV Need Help? Read It Watch It Submit Answer 5. [-/1 Points] DETAILS SERPSE10 30.1.OP.006. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A strong electromagnet produces a uniform magnetic field of 1.60 T over a cross-sectional area of 0.240 m2. A coil having 160 turns and a total resistance of 17.0 0 is placed around the electromagnet. The current in the electromagnet is then smoothly reduced until it reaches zero in 20.0 ms. What is the current induced in the coil? A Need Help? Read It Watch It Submit Answer 6. [-/1 Points] DETAILS SERPSE10 30.1.OP.007. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 25-turn circular coil of radius 5.00 cm and resistance 1.00 $ is placed in a magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies in time according to the expression B = 0.010 Ot + 0.040 0t , where B is in teslas and t is in seconds. Calculate the induced emf in the coil at t = 4.40 s. mV Need Help? Read It Watch It Submit Answer7. [-/1 Points] DETAILS SERPSE10 30.1.OP.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A loop of wire in the shape of a rectangle of width w and length L and a long, straight wire carrying a current / lie on a tabletop as shown in the figure below. (a) Determine the magnetic flux through the loop due to the current I. (Use any variable stated above along with the following as necessary: Ho.) (b) Suppose the current is changing with time according to I = a + bt, where a and b are constants. Determine the magnitude of the emf (in V) that is induced in the loop if b = 12.0 A/s, h = 1.00 cm, w = 20.0 cm, and L = 1.35 m. (c) What is the direction of the induced current in the rectangle? clockwise O counterclockwise The magnitude is zero. What If? Suppose a constant current of I = 6.00 A flows in the straight wire and the loop moves from an initial position ho = 1.00 cm toward the bottom of the figure at a constant speed of v = 18.0 cm/s. (d) What is the magnitude of the induced emf (in V) in the loop 1.00 s after it begins to move? V (e) What is the direction of the induced current in the loop 1.00 s after it begins to move? O clockwise O counterclockwise The magnitude is zero. Need Help? Read It Watch It Submit Answer 8. [-/1 Points] DETAILS SERPSE10 30.2.OP.015.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is R = 7.00 0, and a 2.50-T magnetic field is directed perpendicularly downward, into the page. Let { = 1.20 m. (a) Calculate the applied force required to move the bar to the right at a constant speed of 2.30 m/s. N (to the right) (b) At what rate is energy delivered to the resistor? W Need Help? Read It Master It Submit