A mass of 2.31 kg is hanging at rest on a non-conductive string. The string is connected to a circuit which is partially immersed in a magnetic field of magnitude B = 1.18 T. The length l = 0.315 m. a) Find the direction of the magnetic field B b) Find the current I c) If the battery voltage is 220 V, find the resistance R.

An alien from a planet in the galaxy M31 (Andromeda) has a ray gun that shoots protons at a speed of 2.0 × 10^5 m/s. Design a magnetic shield that will deflect the protons away from your body. A) Suppose that the magnetic field has horizontal direction and you want to deflect the beam through a path with radius R = 2.0 m as shown in (Figure 1). Find the field strength needed to achieve the desired deflection. The mass of a proton is 1.67× 10^−27 kg and its charge is 1.6× 10^−19 C. B) What is the direction of the magnetic field in the region defined in (Figure 1), that would cause the deflection shown for the proton beam? along the path of the proton beam into the page toward the center of the curved path out of the page C)What is the direction of the magnetic force in the region defined in (Figure 1), that would cause the deflection shown for the proton beam? along the path of the proton beam into the page toward the center of the curved path out of the page

Certain experiments must be performed in the absence of any magnetic fields. Suppose such an experiment is located at the center of a large solenoid oriented so that a current of I = 3.40 A produces a magnetic field that exactly cancels Earth's 4.50 x 10-5 T magnetic field. Find the solenoid's number of turns per meter. HINT turns/m

C. For wire m to be levitated. what is the direction of its eurrent ? d) Find the mas m of the third wire. Your answer should be in terms of , I, Im, a, h, g, and l

rectilinear conductor with current 8 A and length 25 cm, is located in the homogeneous magnetic field and forms the alpha angle with the induction lines. The magnetic force acting on the conductor has the maximum value when the alpha angle is: a) narrow b) wide c) zero d) 90 °

An electron with a kinetic energy of 1.04 x 104 eV is initially moving south in a uniform magnetic field of magnitude 488 G, directed east. Describe in detail the electron's trajectory, including its shape and orientation. the radius of the path   direction of initial force        shape of trajectory

Two long, parallel wires are separated by a distance d = 0.400 m. Electric currents I₁ = 0.30 A and I₂ = 0.50 A have the directions in Figure below. a) Calculate the magnitude of the force exerted by each wire on a portion of length 1.20 m of the other. Is the force attractive or repulsive? 1₁ b) d 12

The current flowing through the conductor creates a magnetic field as shown. In what direction does the conventional current flow? Towards the end of the wire labelled "X" Towards the end of the wire labelled "Y"