10. A coil of 50 turns and area 0.5 m^2 is in magnetic field of induction 2 x 10 -3 Wb/m^2. If the coil is reversed in time of 10.0 ms, what is the e.m.f. induced in the coil? Oa.0.1 V Ов. 10v
Q: The bolt of lightnin; 133-turn coil orientec in the lightning bolt
A: Givend=100 mN=133 turnsChange in current, dI=5.22×106 Adt=10.9 μs=10.9×10-6 sr=0.881 m
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- 003 A circular coil of wire 7.8 cm in diameter has a resistance of 1.61 2. It is located in a magnetic field of 0.304 T directed at right angles to the plane of the coil. The coil is removed from the field in 0.169 s. What is the induced emf in the coil? As- sume the magnetic flux is reduced linearly. Answer in units of V. How much electric energy is lost in the process? Answer in units of J.A circular loop with a radius of 2.5 m rests horizontally inside a uniform magnetic field of 0.9 T in a down direction. What is the induced emf when the magnetic field drops to zero in 0.75 s? O a. 9.40 V O b. 23.6 V O c. 34.2 V O d. 17.5 V31. A single loop of wire of radius 0.23 m is placed in a 0.75 T magnetic field as shown. The magnetic field is changed to a strength of 0.50 T in the opposite direction in 0.61 s. X D. X X X X X +0.23 m Before X X X B X X What is the average emf induced in the coil? A. 0.068 V B. 0.094 V C. 0.34 V 0.47 V 0.23 m After Ein 10 ● B
- 1. The conductive bar m = 45g starts moving from rest, the magnetic field B = 2.8T, the length of bar inside of B field L=22cm and the resistance of the bulb R=2.292. What is the induced emf E on the bar when it reaches the largest speed? Find the largest speed of the bar. 2. Find the induced current direction in the loop. O D D O Q 6 O S 0 RI O O Secondary circuit O C O turns, 1₂ = 3. The primary coil with N₁ = 6400 turns 1₁ = 12cm, the secondary coil with N₂ = 1400 6.0cm, r₁ r₂ = 2.4cm. E = 12V, adjustable R changes from 1652 to 480 in 230ms, R₁ = 2202. Find the current of R₁ and direction. (Resistance of coils can be ignored and no magnetic flux loss) O Primary circuitA 2.5 cm radius single circular wire coil is removed from a 4.5 x 10 T magnetic field in 0.25 s. What is the EMF induced in the coil? Select one: a. -3.5 x 10-V b. -2.2 x 10-7 V C. -2.8 x 10-V d. -1.1 x 10V6. An emf of 24.0 mV is induced in a 500 turn coil at an instant when the current is 4.0 A and is changing at the rate of 10.0 A/s. What is the magnetic flux through each turn of the coil?
- Q8.5 A circular plastic core is wrapped with a 22.0 m-long copper wire, with a diameter of 0.0200 mm and resistivity of 1.68×10-8 9-m, coiled 88 times, and its ends are linked to create a closed circuit. A magnetic field that increases at a constant rate of 12.0 mT/s, parallel to the coil's axis. Calculate the rate at which the wire produces thermal energy6. The conducting rod shown in the accompanying figure moves along parallel metal rails that are 25-cm apart. The system is in a uniform magnetic field of strength 0.75 T, which is directed into the page. The resistances of the rod and the rails are negligible. a. What is the emf (including its sense) induced in the rod when it is moving to the right with a speed of 5.0 m/s? b. What force is required to keep the rod moving at this speed? c. What is the rate at which work is done by this force? d. What is the power dissipated in the resistor? B x M x x t x 25 cm 5.0 m/s 0.25 N * N23. A single coil of wire of area 6.0x10-3 m² is positioned in a uniform 0.18 T magnetic field as shown. The coil is rotated 90° about axis XY in 4.2x10 s. What average emf is induced by the coil? A. B. с. D. O V 0.13 V 0.26 V 43 V хх ххх X X X X X X X X X X X Y X X X X X X X X X B X X X
- 27.46 A coil with magnetic moment 1.45 Amp-meter2 is oriented initially with its magnetic moment antiparallel to a uniform 0.835-T magnetic field. What is the change in potential energy of the coil when it is rotated 180 degrees so that its magnetic moment is parallel to the field?A flat circular coil with 100 turns has a radius of 0.04 m and a resistance of 0.5 ohms. It is exposed to a changing magnetic field that is perpendicular to the coil. The rate at which the magnetic field is changing is ∆B/∆t=0.782(T/s). a. Find the emf (voltage) induced in the coil. b. What is the current in the coil? c. Sketch a picture of the scenario and, based on your drawing, show the direction of the induced current PLEASE SHOW ALL WORK!! Thank you!!A conducting wire loop of radius 12 cm, that contains a 4.0-2 resistor, is in the presence of a uniform magnetic field of strength 3.0 T that is perpendicular to the plane of the loop. If the magnetic field is turned off in a time of 0.50 s, what is the current induced in the loop? a. 52 mA b. 68 mA O c. 95 mA d. 117 mA O e. 168 mA