A square loop 13.0 cm on a side has a resistance of 5.45 \Omega. It is initially in a 0.380 T magnetic field, with its plane perpendicular to {\bf{\vec B}}, but is removed from the field in 66.0 ms. Calculate the electric energy dissipated in this process. E=
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- A loop of wire with radius r= 0.183 m is in a magnetic field of magnitude B as shown in the figure. The magnetic field is perpendicular to the plane of the loop. B changes from B1= 0.22 T to B2= 7.5 T in Δt = 7.5 s at a constant rate. (a) Express the magnetic flux Φ going through a loop of radius r assuming a constant magnetic field B. (b) Express the change in the magnetic flux going through this loop, ΔΦ, in terms of B1, B2 and r. (c) Express the magnitude of the average induced electric field, E, induced in the loop in terms of ΔΦ, r and Δt.Q.A) A constantan wire of length 12 m and having a cross sectional area 1.4x10-4 m2 is converted into 3-turn circular loop. It is connected to a voltage of 0.160 V. If the loop is placed in a uniform magnetic field of magnitude 0.66 T at an angle of 64˚, then calculate torque in the circular loop? (The resistivity (ρ) of constantan= 49 x10 -8 Ω.m.)A 130 turn , 2.10 cm diameter coil is at rest in a horizontal plane. A uniform magnetic field 60° away from vertical increases linearly from 0.620 T to 1.66 Tin 0.650 s. Figure 1 of 2 > Vertical 60° Coils
- A simple electric motor consists of a loop of wire with a 7 cm radius sitting in a 46 T external magnetic field. The angles shown in the figure are θ = 69 degrees and φ = 21 degrees. How much current is needed in the loop to start the motor if it requires a torque of 0.7 Nm ? (in A) 1.059 A 2.758 A 0.210 A 0.989 AThe figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is R = 5.60 0, and a 2.50-T magnetic field is directed perpendicularly downward, into the page. Let { = 1.20 m. Bin R app (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? WThe figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is R = 5.00 N, and a 2.50-T magnetic field is directed perpendicularly downward, into the page. Let l = 1.20 m. x Pin B, R app (a) Calculate the applied force required to move the bar to the right at a constant speed of 1.70 m/s. 3.06 N (to the right) (b) At what rate is energy delivered to the resistor? 5.202 W Need Help? Read It Master It xx x x x x x x × x x x x × × X X X x X X X