8.0 cm × -150 mA × X X X X X X X 8.0 cm

c. What is the resistance of the coil given that the diameter of the wire is 2.00 mm? (Recall, resistance of wire is given by R = ρL/A, where ρ is the resistivity of the metal, L is the length of the wire, and A is the cross-sectional area.)

An electrically conductive rod is moving through a uniform magnetic flux at a constant velocity at right angles, as shown by its cross-section in the diagram. The velocity is in the x-direction, the rod is of length 150 mm along z, and the magnetic flux density is 0.2 T in the positive y-direction. Speed If the potential difference (voltage) across the ends of the rod is 5.8 Volts, what is the magnitude of the velocity? m/s Not perpendicular If the rod is passing through the flux with its axis not at right angles what can you be sure of? The speed to generate 5.8 V would have to be smaller. • The speed to generate 5.8 V would have to be bigger. The speed to generate 5.8 V would be the same.

A wire coil of 20 turns has a cross-sectional area of 8 cm2. The coil is placed in a uniform field of a large magnet with B = 0.47 T. The coil is suddenly rotated 90 o from an orientation parallel to the field to one perpendicular to the field. The time to flip the coil is 0.43 s. What is the magnitude of the average emf produced?  What will be the average current produced if the circuit of the coil is closed and the resistance is 65 ohm?

A circuit is made with a resistor of resistance 25 ohms and a movable bar with length 15 cm moving to the left with speed 8 m/s. The whole circuit is in a magnetic field B = 1.5 T (into page). Use this set up to answer the following questions. What is the magnitude (no negative answers) of the power delivered to the resistor in watts? Answer to 4 decimal places.

The magnetic field of the Figure below decreases from 1 T to 0.4 T in 1.2 s. A 6 cm diameter conducting loop with a resistance of 0.01 Ω is perpendicular to magnetic field as shown. What are the size and direction of the current induced in the loop?

QUESTION 7 Refer to the figure in the previous question. What is the emf induced when a 5.48-cm conducting rod attached to a U-shaped conductor moves at 1.56 m/s perpendicular to a magnetic field of strength 14.9 T? Please write the numeric answer in terms of V (volts). Normal format with 3 SF.

The magnetic field in a region of space is given by B-8 +8. A coil of N turns is oriented so that its cross-sectional area is in the x direction: A-A1. A small bulb is connected across the ends of the coil. The total resistance of the coil and the bulb is R. Find an expression for the current through the bulb if By(t) = Bo(t/to) and By-Bo where Bo and to are constants. (Use the following as necessary: A, B, N, R, to, and t. Enter the magnitude.)

In the figure (Figure 1) the top wire is 1.1 −mm−mm -diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current flow through the two bottom wires is 75 AA in each. Calculate the required current flow in the suspended wire. Express your answer using two significant figures. ICu=____________A