A rigid, non-conductive loop is falling through a uniform magnetic field that is perpendicular to the plane of the loop. Initially, the loop is completely within the field, but then it falls into a region where no magnetic field is present. Which one of the following quantities does not vary during the fall? O the magnetic field penetrating the loop O the area of the loop penetrated by the magnetic field O the current in the loop the magnetic flux through the loop O the emf in the loop
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- A flat circular coil with 153 turns, a radius of 2.46 x 10-² m, and a resistance of 0.597 £ is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of AB/At = 0.743 T/s, thereby inducing a current in the coil. Find the magnitude of the magnetic field at the center of the coil that is produced by the induced current. Number i Units←1.0m3 ↑ XXX xxx 1.0m xxx ↓ x is direction. of B 个 [.0m xxx xxx xxx V=4.0m/s X Consider the two scenarios (i) and (ii). (i) has a square wire in a magnetic field where the field changes -2.0 T/s. (ii) is in a constant magnetic field, B = 0.50 T but has a conducting bar that moves to the right at 4.0 m/s. Both scenarios have a total resistance of 2.0 2. (a) What is the EMF (voltage) in the wire loops in each scenario? (b) What is the current and direction of the current in each scenario?Mindy, a medical device engineer, is designing an apparatus to monitor the breathing of a patient. The apparatus consists of a stretchable loop of conductive material wrapped in a small band around the patient's chest. A constant uniform external magnetic field is produced by a nearby solenoid. As the patient inhales, his chest expands, stretching the chest band. The resulting increase in the area of the loop causes an emf to be induced in the loop. By measuring the induced emf, a device user can estimate the patient's breathing rate. Mindy needs the apparatus to be able to detect a change in area as small as 5.50 cm? occuring over a time period of 1.50 s. If the minimum emf that can be reliably detected is 2.00 x 10-4 V, what is the magnitude of the minimum external magnetic field that would be needed from the solenoid? magnitude of minimum external magnetic field: T
- 14Please answer the question in the picture belowThe figure shows a uniform magnetic field that is normal to the plane of the conducting loop of resistance R. Note: the area of the non- circular portion of the circuit is negligible compared to that of the loop. B 04 Which entry in the table below correctly pairs the change in the system with the direction of the induced current through R? change in the system direction of current through R decrease the area of the loop rotate loop into the paper decrease the magnitude of B increase the area of the loop pull loop to the right from top toward bottom no induced current from bottom toward top from bottom toward top from top toward bottom
- 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. B(T) 2 0.1 0.3 0.5 0.8 0.9 t(s) -2 QUESTION 5 How much power is dissipated by the coil at time = 0.6 seconds? O 0.2 W O 0.4 W O 0,5 W O None of theseFind the flux of the Earth's magnetic field of magnitude 5.00 ✕ 10-5 T, through a square loop of area 30.0 cm2 for the following. (a) when the field is perpendicular to the plane of the loop T·m2(b) when the field makes a 30.0° angle with the normal to the plane of the loop T·m2(c) when the field makes a 90.0° angle with the normal to the plane T·m2A loop is fixed in position in the location of a magnetic field directed out of the page. The magnetic field gets weaker over time. Determine the direction of the induced current in the wire.
- In which situation is there no end induced in a particular coil A Changing the magnetic field applied on the coil B moving the coil itself through a magnetic field C Suspending the coil within the magnetic field D Moving the magnetic field around the coilA magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.22 V and a current of 4.3 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same magnetic field (again perpendicular to the plane of the coil and with a magnitude changing at the same rate). What (a) emf and (b) current are induced in the square coil? (a) Number i (b) Number i Units Units