5. A wire forms a closed square loop of side b = 16.0cm as shown in the figure. A longconductor in the plane of the loop placed at a = 12.0cm carries a current that varies withtime asI = 4.5 t2 - 10.0twhere I is in amperes and t is in seconds. (a) Find the emf in the square loop at t= 3.0s.(b) What is the direction of the induced current in the loop?ab

Solution: as given in the problem b = 16 cm a = 12 cm I = 4.5t2-10t

5. A wire forms a closed square loop of side b = 16.0cm as shown in the figure. A long conductor in the plane of the loop placed at a = 12.0cm carries a current that varies with time as 1 = 4.5 t2 - 10.0t where I is in amperes and t is in seconds. (a) Find the emf in the square loop at t= 3.0s. (b) What is the direction of the induced current in the loop?

5. A wire forms a closed square loop of side b = 16.0cm as shown in the figure. A long conductor in the plane of the loop placed at a = 12.0cm carries a current that varies with time as 1 = 4.5 t2 - 10.0t where I is in amperes and t is in seconds. (a) Find the emf in the square loop at t= 3.0s. (b) What is the direction of the induced current in the loop?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter25: Electromagnetic Induction

Section: Chapter Questions

Problem 60A

See similar textbooks

Similar questions

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 generator at a large power plant has an output of 1,000,000 kW at 24,000 V. (a) If it were a DC generator, what would he the current in it? (b) What is its energy output each day—in joules and in kilowatt—hours? (c) If this energy is sold at a price of 10 cents per kilowatt-hour, how much revenue does the power plant generate each day?
A generator spinning at a rate of 1.20 103 rev/min produces a maximum emf of 45.0 V. At what angular speed does this generator produce a maximum emf of 64.0 V?
A motor in normal operation carries a direct current of 0.850 A when connected to a 120-V power supply. The resistance of the motor windings is 11.8 . While in normal operation, (a) what is the back emf generated by the motor? (b) At what rate is internal energy produced in the windings? (c) What If? Suppose a malfunction slops the motor shaft from rotating. At what rate will internal energy be produced in the windings in this case? (Most motors have a thermal switch that will turn off the motor to prevent overheating when this stalling occurs.)
What is the energy density at the center of a circular loop of wire carrying a 26.0 A current if the radius of the loop is 20.0 cm ? How many turns of wire would be required to make a 110 mH inductance out of a 28.0 cm -long air-filled coil with a diameter of 5.0 cm ?
A solenoid with 475 turns has a length of 6.00 cm and a crosssectionalarea of 2.80 x 10-9 m2. Find (a) the solenoid’sinductance and (b) the average emf around the solenoid ifthe current changes from +2.00 A to 22.00 A in 8.33 x 10-3 s.
A small rectangular loop of wire is located close to a long straight wire initially carrying a current I = 114 A (see figure below). Find the average emf induced in the loop if the current in the wire reverses direction in a time interval of 1/137s
A square wire with 2 m sides is perpendicular to a uniform magnetic field, with half the area of the loop in the field as shown in the figure. The loop contains a 20 V battery with negligible resistance. If the magnitude of the field varies with time according to B = 1.0410 - 0.8400 t with B in teslas and t in seconds, what is the total emf in the circuit?
How do you solve this question? The first question's answer is c) 3.0 T but I can't seem to get the right answer if I attempt use the equation emf = (BA)/t. Is t 1.25, 5, or something else?
The figure shows a copper rod moving at a velocity of 4.5 m/s parallel to a long straight wire carrying a 2.2 A current. Calculate the emf induced in the rod, assuming that a = 1 cmcm and b = 2.8 cm.
How many turns of wire would be required to make a 150 mH inductance out of a 20.0 cm-long air-filled coil with a diameter of 4.8 cm?
A 20.0 V emf is applied to a coil with an inductance of 40.0 mH and a resistance of 0.500 Ω. a) Determine the energy stored in the magnetic field when the current reaches 1/4 of its maximum value. (Answer in J and to two decimal places) b) How long does it take for the current to reach this value? (Answer in s and to four decimal places)