Three very long, straight, parallel wires each carry currents of 10 A, directed into of the page. Thewires pass through the vertices of a right isosceles triangle of side 9 cm. What is the magnitude of themagnetic field at point P at the midpoint of the hypotenuse of the triangle?
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wires pass through the vertices of a right isosceles triangle of side 9 cm. What is the magnitude of the
magnetic field at point P at the midpoint of the hypotenuse of the triangle?
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- An electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's field, which has a strength of 5.0105 T. (a) What strength electric field must be applied perpendicular to the Earth’s field to make the election moves in a straight line? (b) If this is done between plates separated by 1.00 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a collection,)A long, straight wire of radius R caries a current I that is distributed uniformly over the cross-section of the wire. At what distance from the axis of the wire is the magnitude of the magnetic field a maximum?Acircularcoiofwireofradius5.Ocmhas2Otums and carries a current of 2.0 A. The coil lies in a magnetic field of magnitude 0.50 T that is directed parallel to the plane of the coil. (a) What is the magnetic dipole moment of the coil? (b) What is the torque on the coil?
- A particle moving downward at a speed of 6.0106 m/s enters a uniform magnetic field that is horizontal and directed from east to west. (a) If the particle is deflected initially to the north in a circular arc, is its charge positive or negative? (b) If B = 0.25 T and the charge-to-mass ratio (q/m) of the particle is 40107 C/kg. what is ±e radius at the path? (c) What is the speed of the particle after c has moved in the field for 1.0105s ? for 2.0s?The cross-sectional dimensions of the copper strip shown are 2.0 cm by 2.0 mm. The strip carries a current of 120 A, and it is placed in a magnetic field of magnitude B = 1.4 T. What are the value (in V) and polarity of the Hall potential in the copper strip? (Assume the charge carrier density of copper is 8.0 x 1028 electrons/m³). B 2.0 cm X 2.0 mm value polarity The ---Select--- of the strip is at a higher potential.As shown below, a horizontal 4.4 m long wire with a mass of 0.74 kg is carrying a current. The wire is completely immersed in a uniform 2.3 T B-field that is perpendicular to the current direction and as a result the wire levitates. Determine the current through the wire and the direction of the external B-field. I = Direction of external B-field Choose direction ✓
- A straight conductor of length l moves with an acceleration a = 0.1 ms−2 at right angles to amagnetic field of uniform strength B = 10 T. The e.m.f. between the ends of the conductorincreased from 0 to 5 V during the first 20 s after the beginning of motion. Calculate l.A long, straight wire carries a 13.0 A current. An electronis fired parallel to this wire with a velocity of 250 km/s in the samedirection as the current, 2.00 cm from the wire What should be the magnitude and direction of a uniform electric field that will allow the electron to continue to travel parallel to the wire?Tutorial Exercise In an experiment designed to measure the Earth's magnetic field using the Hall effect, a copper bar 0.415 cm thick is positioned along an east-west direction. Assume n = 8.46 x 1028 electrons/m3 and the plane of the bar is rotated to be perpendicular to the direction of B. If a current of 8.00 A in the conductor results in a Hall voltage of 5.52 x 10-12 v, what is the magnitude of the Earth's magnetic field at this location?
- Tutorial Exercise In an experiment designed to measure the Earth's magnetic field using the Hall effect, a copper bar 0.495 cm thick is positioned along an east-west direction. Assume n = 8.46 × 1028 electrons/m³ and the plane of the bar is rotated to be perpendicular to the direction of B. If a current of 8.00 A in the -12 conductor results in a Hall voltage of 4.37 x 10 V, what is the magnitude of the Earth's magnetic field at this location? Part 1 of 3 - Conceptualize From this Table of Approximate Magnetic Field Magnitudes, the magnitude of the Earth's magnetic field is about 50 μT. We expect a result with this order of magnitude. Part 2 of 3 - Categorize We will find the magnitude of the magnetic field from the equation for the Hall effect voltage. Part 3 of 3 - Analyze Hall effect voltage is given by the following. IB nqt' AVH where I is the current, n is the volume density of electrons, B is the magnitude of the magnetic field, and t is the thickness of the copper bar. Solving…When the direct current is 2.00 A in a single wire of the bundle of 10 wires, the total current in the bundle of wire that approximates the long straight wire is 20.0 A. What isthe magnitude of the B field 3.00 cm from this long straight wire carrying a current of20.0 A? What is the magnitude of the B field 9.00 cm from the wire carrying 20.0 A?An infinite solid cylindrical conductor has radius c and carries a current I. The current is uniformly distributed over its cross section. A coaxial infinite cylindrical conducting shell with inner radius b and outer radius a carries the same magnitude but opposite direction current. If I= 120 A, c= 0.4 cm, b= 1.8 cm, a= 2 cm. What is the magnitude of the B-field at the distance of: 1) 0.3 cm from the center of the system. 2) 1 cm from the center of the system.