A 95-turf square wire coll of area 0.040 m² rotates about a vertical axis at 1,330 rev/min, as indicated in the figure below. The horizontal component of Earth's magnetic field at the location of the loop is 2.0 x 10-5 T. Calculate the maximum emf (in V) induced in the coil by Earth's field. Need Help? 20.0 cm 20.0 cm Read Watch t
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- 2. DETAILS MY NOTES A long solenoid with 2.00 x 10³ turns per meter and radius 2.00 cm carries an oscillating current I= 4.00 sin 110mt, where I is in amperes and it is in seconds. E= ASK YOUR TEACHER (a) What is the electric field induced at a radius r= 1.00 cm from the axis of the solenoid? (Use the following as necessary: t. Let E be measured in millivolts/meter and t be measured in seconds.) Submit Answer (b) What is the direction of this electric field when the current is increasing counterclockwise in the solenoid? O clockwise O counterclockwiseI Review | Constants Periodic Table Microphones are used to convert sound vibrations to electrical signals. In one kind of microphone, sound waves move a coil of wire up and down in a magnetic field, as shown in (Figure 1). The coil shown has a diameter of 1.8 cm and has Part A 100 turns; the 0.010 T magnetic field points radially out from the north pole to the south. If the microphone's emf at some instant is 20 mV, what is the speed of the coil? Express your answer with the appropriate units. ? x" х.10п X m v = Value S Submit Previous Answers Request Answer Provide Feedback Next > Figure < 1 of 1 S Wire coilQUESTION 4 What is the direction of the induced current? AA B (outward) vAt O A. clockwise O B. counterclockwise QUESTION 5 Refer to the figure in the previous question. What is the emf induced when a 5.41-cm conducting rod attached to a U-shaped conductor moves at 1.1 m/s perpendicular to a magnetic field of strength 17.4 T? Please the numeric answer in terms of V (volts). Normal format with 3 SF, QUESTION 6 Find the magnitude of the induced emf in a circular coil with 27 loops and a radius 6.82 cm. The coil begins completely outside any magnetic field, and then during the next 12.5 seconds it moves completely into a uniform 4.75-T magnetic field. Assume that the plane of the loop and the direction of motion are both perpendicular to the magnetic field. Express your answer in Volts. Normal format with 3 SF.
- Constants A 17-cm-diameter circular loop of wire is placed in a 0.58-T magnetic field. Part A When the plane of the loop is perpendicular to the field lines, what is the magnetic flux through the loop? Express your answer to two significant figures and include the appropriate units. HÀ ? Value Units Submit Request Answer Part B The plane of the loop is rotated until it makes a 45 ° angle with the field lines. What is the angle in the equation PB BA cos 0 for this situation? Express your answer using two significant figures. Πν ΑΣφ ? = Submit Request AnswerI Review | Constants A 10-cm-diameter parallel-plate capacitor has a 1.0 mm spacing. The electric field between the plates is increasing at the rate 9.0x105 V/m s. Part A You may want to review (Pages 884 - 886). What is the magnetic field strength on the axis? Express your answer to two significant figures and include the appropriate units. HÀ B = Value Units Submit Request Answer Part B What is the magnetic field strength 3.5 cm from the axis? Express your answer to two significant figures and include the appropriate units. HÁ ? B = Value Units Submit Request Answer • Part C What is the magnetic field strength 6.7 cm from the axis? Express your answer to two significant figures and include the appropriate units. ? B = Value Units Submit Request AnswerI1 A very long (infinite) coil of radius b has m turns per unit length and carries a current a) Find the magnetic field inside the coil. b) Find the electric field inside the coil. c) Find the electric field outside the coil.
- 2. For each case, determine the magnitude and direction at the center of the half circles. C. d. a. b. R 3R Assume the straight segments of current below are semi-infinite (i.e., very long compared to R). I 2R 2R I For direction, give the angle relative to the plane of the paper. 1 2R 28258.081a. Determine the magnitude of the magnetic field at a point 33.0 mm from for a current-carrying conductor with 1.5 A of current running through it b. How would the magnetic field vary for the same conductor above if it was 2.5m long, and the current-carrying conductor was wound into a coil with a total of 5.0x103 turns? Express this value as a ratio to the magnetic field found in part a.Binto The ring above has a constant magnetic field that is oriented into the page. The magnitude of the magnetic field decreases. Does the flux increase, decrease, or stay the same for the ring? What is the direction of the induced magnetic field? What is the direction of the induced current in the ring? ✪
- In the figure(Figure 1) the top wire is 1.20 mm - diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current is 50.0 A in each of the two bottom wires. Figure -3.5 cm- ZO -3.5 cm- NI-3.5 cm- IP 1 of 1 Part A Calculate the required current flow in the suspended wire. Submit 195] ΑΣΦ Provide Feedback Request Answer DMC ? A! Required information A long straight wire carrying a current /is in the plane of a circular loop of wire. The current / is decreasing. Both the loop and the wire are held in place by external forces. The loop has resistance 33.2 Q. I -Long wire Conducting loop At one instant, the induced current in the loop is 80.1 mA. What is the rate of change of the magnetic flux through the loop at that instant in webers per second? Wb/sPivot Circular loop 1. The above figure shows an edge-on view of a 10-cm-diameter circular loop rotating in a uniform 0.050 T magnetic field. What is the magnetic flux through the loop when Ois 0°, 30°, 60°, and 90°?