2) A standard motional emf setup in the xy consists of a constant, uniform magnetic field which points into the page and has magnitude 0.25 T. The circuit's entire resistance is 2 Ohms at the location shown (on the movable rail). The movable rail (double-line on the right side of the circuit) is going left at a speed of 8 m/s. i. Which side of the resistor is at a lower electric potential due to the induction effect? A. Top B. Bottom C. Both are equal but nonzero D. Both are zero ii. The magnitude of the current through the resistor due to the induction effect will be A. 0.40 A B. 0.20 A C. 0.15 A D. 0.030 A E. Zero A+, Ⓡind -, Bind into page, I ind CW iii. Which way should the movable rail go so that the induced current is counterclockwise? A. Left 15 cm B. Right C. It should remain stationary D. None of these. There is no way a counterclockwise induced current can be created by moving the rail. AⓇ-, ind +, Bind out, I ind CCW 20 cm B 202

2) A standard motional emf setup in the xy consists of a constant, uniform magnetic field which points into the page and has magnitude 0.25 T. The circuit's entire resistance is 2 Ohms at the location shown (on the movable rail). The movable rail (double-line on the right side of the circuit) is going left at a speed of 8 m/s. i. Which side of the resistor is at a lower electric potential due to the induction effect? A. Top B. Bottom C. Both are equal but nonzero D. Both are zero ii. The magnitude of the current through the resistor due to the induction effect will be A. 0.40 A B. 0.20 A C. 0.15 A D. 0.030 A E. Zero A+, Ⓡind -, Bind into page, I ind CW iii. Which way should the movable rail go so that the induced current is counterclockwise? A. Left 15 cm B. Right C. It should remain stationary D. None of these. There is no way a counterclockwise induced current can be created by moving the rail. AⓇ-, ind +, Bind out, I ind CCW 20 cm B 202

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter13: Electromagnetic Induction

Section: Chapter Questions

Problem 64AP: A metal bar of mass 500 g slides outward at a constant speed of 1.5 cm/s over two parallel rails...

See similar textbooks

Similar questions

Design a current loop that, when rotated in a uniform magnetic field of strength 0.10 T, will produce an emf =0 sin t. where 0=110V and 0=110V .
In the August 1992 space shuttle flight, only 250 m of the conducting tether considered in Example 23.2 could be let out. A 40.0 V motional emf was generated in me Earth’s 5.00105T field, while moving at 7.80103m/s. What was the angle between the shuttle’s velocity and the Earth’s field, assuming the conductor was perpendicular to the field?
The armature and field coils of a series-wound motor have a total resistance of 3.0 . When connected to a 120-V source and running at normal speed, the motor draws 4.0 A. (a) How large is tire back emf? (b) What current will the motor draw just after it is turned on? Can you suggest a way to avoid this large initial current?
Check Your Understanding (a) What is the magnetic flux through one turn of a solenoid of self- inductance 8.0 × 10-5 H when a current of 3.0 A flows through it? Assume that the solenoid has 1000 turns and is wound from wire of diameter 1.0 mm. (b) What is the cross-sectional area of the solenoid?
The normal to tt plane of a single-turn conducting loop is directed at an angle to a spatially uniform magnetic field B. It has a fixed area and orientation relative to the magnetic fleck Show that the emf induced In the loop is given by i = (dB/dt)(Acos),where A is the area of the loop.
A rectangular copper ring, of mass 100 g and resistance 0.2 1, is in a region of uniform magnetic field that is perpendicular to the area enclosed by the ring and horizontal to Earth’s surface. The ring is let go from rest when it is at the edge of the nonzero magnetic field region (see below). (a) Find its speed when the ring just exits the region of uniform magnetic field. (b) If it was let go at t = 0, what is the time when it exits the region of magnetic field for the following values: a=25cm,b=50cmB=3T , and g=9.8m/s2 ? Assume the magnetic field of the induced current is negligible compared to 3T.
A long solenoid with 10 turns per centimeter is placed inside a copper ring such that both objects hove the same central axis. The radius of the ring is 10.0 cm. and the radius of the solenoid is 5.0 cm. (a) What is the emf induced in the ring when the current 2 through the solenoid is 5.0 A and changing at a rate of 100 A/s? (b) What is the emf induced in the ring when 1=2.0A and. dI/dt=100A/s ? (c) What is the electric field inside the ring for these two cases? id: Suppose the ring is moved so that its central axis and the central axis of the solenoid are still parallel but no longer coincide. (You should assume that the solenoid is still inside die ring.) New what is the emf induced in the ring? (el Can you calculate the electric field in die ring as you did in part (c)?
A solenoid with 4 x 107turns/m has an iron core placed in it whose magnetic susceptibility is 4.0 x 103. (a) If a cent of 2.0 A flows through the solenoid, what is the magnetic field in the iron core? (b) What is the effective surface current formed by the aligned atomic current loops in the iron core? (c) What is the self-inductance of the filled solenoid?
A long, cylindrical solenoid with 100 turns per centimeter has a radius of 1.5 cm. (a) Neglecting end effects, that is the self-inductance per unit length of the solenoid? (b) If the current through the solenoid changes at the rate 5.0 AJs, what is the emf induced per unit length?
Check Your Understanding A long solenoid of cross-section area 5.0 cm2is wound with 25 turns of wire pet centimeter. It is placed in the middle of a closely wrapped coil of 10 turns and radius 25 cm, as shown below. (a) What is the emfInduced In the coil when the current through the solenoid Is decreasing at a rate dl/dt= -0.20A/s? (b) What Is the electric field Induced In the coil?
A small series-wound dc motor is operated from a 12-V car battery. Under a normal load, the motor draws 4.0 A, and when the armature is clamped so that it cannot turn, the motor draws 24 A. What is the back emf when tire motor is operating normally?
The flip coil of the preceding problem has a radius of 3.0 cm and is wound with 40 turns of copper wire. The total resistance of tire coil and ballistic galvanometer is 0.20 When the coil is flipped through 180° in a magnetic fielda change of 0.090 C flows through the ballistic galvanometer. (a) Assuming that and the face of the coil are initially perpendicular, what is tire magnetic field? (b) If the coil is flipped through 90°, what is tire reading of the galvanometer?