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- In a certain space at the earth’s surface the magnetic field is 0.1 T directed east. What is the magnitude and direction of the magnetic force exerted by this magnetic field on a 2µC charge moving 1 x 106m/s; upward? A. 0.8 N; north B. Zero C. 8 N; north D. 0.2 N; northTwo infinitely long parallel wires are at a distance of 5.0 cm apart. If the wires carry a current of 5.1A, what is the exchanged force per meter between the wires ( in units of uN )? Select one: O A. 104.0 O B. 135.3 O C. 83.2 O D. 59.8 O E. 122.2 Next pA given neuron in the brain carries a current of 3.1 * 10-8 A. Ifthe SQUID detects a magnetic field of 2.8 * 10-14 T, how far awayis the neuron? Treat the neuron as a straight wire.A. 22 cm B. 70 cmC. 140 cm D. 176 cm
- What is the force per meter on a lightning bolt at the equator that carries 16000 A perpendicular to the Earth's 3.20x10-5-T field? What is the direction of the force if the current is straight up and the Earth's field direction is due south, parallel to the ground? E W Straight up Straight down No forceB. An electron is moving through a magnetic field in a direction perpendicular to the field as shown below. The charge is moving with a speed of v = 3.5 x 105 and it experiences a force of F = 1.79 x 10-13 N. What is the magnitude and direction of the magnetic field? The charge of an electron is q -1.6 x 10-19 C. 125. The figure shows a cross-section of a coaxial cable. The gray regions are rubber conductors. The current I2 is going into the page and I1 is going out. Determine the net magnetic fields at point a and b including direction. (See problem 31, chapter 29 in Physics for Scientists and Engineers)
- A current I = 30 A is directed along the positive x-axis and perpendicular to a magnetic field. A magnetic force per unit length of 0.18 N/m acts on the conductor in the negative y-direction. Calculate the magnitude and direction of the magnetic field in the region through which the current passes. magnitude ________T direction a. +x direction b. -x direction c. +y direction d. -y direction e. +z direction f. -z direction3. A flat surface with area 7.0 cm² in a uniform magnetic field B. The magnetic flux through this surface is +0.70 mWb. Find the magnitude of the magnetic field and the direction of the area vector A if the flat surface is tilted 50° to the horizontal.6.
- 9. MA proton moving at 4.00 × 106 m/s through a mag- nețic field of magnitude 1.70 T experiences a magnetic force of magnitude 8.20 X 10-13 N. What is the angle between the proton's velocity and the field?A2.1 mm -diameter copper wire carries a 39 Acurrent (uniform across its cross section). Determine the magnetic field at the surface of the wire. Determine the magnetic field inside the wire 0.50 mm below the surfaceA magnetic field has a magnitude of 0.0016 T, and an electric field has a magnitude of 6.4 x 103 N/C. Both fields point in the same direction. A positive 1.7-µC charge moves at a speed of 4.2 x 106 m/s in a direction that is perpendicular to both fields. Determine the magnitude of the net force that acts on the charge. Number .01142 B Units N V 90° E