Two long straight current-carrying wires are lined up parallel to one another in vacuum at a distance ?d. Currents of ?1I1 and ?2I2 flow through the wires, both in the same direction generating the field of ??BM at a midpoint between them. Write down an expression for ??BM in terms of the currents running in each of the wires. Assume vacuum permeability ?0=1μ0=1. Please use "*" for products (e.g. B*A), "/" for ratios (e.g. B/A) and the usual "+" and "-" signs as appropriate. For 1?∗?1A∗B use  1/(A*B). For Greek letters such as ?λ or ?π use lambda and pi. Please use the "Display response" button to check you entered the answer you expect.

Two long straight current-carrying wires are lined up parallel to one another at a distance d. Currents of 4 A and 2 A flow through the wires, both in the same direction generating the field of 8.9x10-5 T at a midpoint between them. Calculate the distance between the wires. Give your answer in Sl units. Use 40 = 47x 10-7 Hm-1.

A 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 force

The magnetic field in the figure is decreasing at the rate 0.2 T/s. (Figure 1) You may want to review (Pages 852 - 855). Figure 2.0 cm 1 cm 1 cm 1 cm 1 of 1 ▼ Part E What is the magnitude of the acceleration of a proton at rest at point c? Express your answer to two significant figures and include the appropriate units. a= Submit Part F Value a = μA What is the direction of the acceleration of a proton at rest at point c? horizontally to the right downward Submit Request Answer Part G horizontally to the left upward a=0 19 Previous Answers Correct Here we learn how to determine the direction of the acceleration of a proton Units What is the magnitude of the acceleration of a proton at rest at point d? Express your answer to two significant figures and include the appropriate units. μÅ Value ZZZ] ? Units B rest in a s ?

How to calculate question a.i?

Consider a wire carrying a current due east in a location where the Earth’s field is due north. A) What is the direction of the force on the wire if both are parallel to the ground?  B) Calculate the force per unit length on the wire, in newtons per meter, if the wire carries 19.5 A and the field strength is 2.85 × 10-5 T.  C) What would the diameter be, in meters, of copper wire (with density ρ = 8.80 × 103 kg/m3) that would have its weight supported by this force in meters?  D)  Calculate the resistance per unit length, in ohms per meter, that this copper wire will have. Copper has a resistivity of ρR = 1.72 × 10-8 Ω⋅m. E) Calculate the potential difference per unit length, in volts per meter, of this wire.

i. Two long, parallel wires are separated by 1.49 cm and carry currents of 2.17 A and 3.93 A. Find the magnitude of the attractive force F that acts on a 3.85 m length of either wire. ii. Do the currents run in the same or opposite directions? How do you know?

Consider a 150 turn square loop of wire 17.5 cm on a side that carries a 46 A current in a 1.75 T field   a. What is the maximum torque on the loop of wire in N⋅m?  b.   What is the magnitude of the torque in N⋅m when the angle between the field and the normal to the plane of the loop θ is 9°?

According to the information. Can you solve the problem?