emf = dflux/dt = A dB/dt
I = emf/R = pi r^2 dB/dt/R = pi*0.03^2*(1-0.4)/1.2/10.0E-3= 0.141 A
. A 6 cm diameter conducting loop with resistance of 10 m Ohm is placed to...
A flexible circular loop 0.10 m in diameter lies in a magnetic field of 1.80 T, directed into the plane of the diagram. The loop is pulled at the points indicated by the arrows, forming a loop of zero area in 0.20 s. Find the induced emf in the circuit. What is the direction of the current through R (up or down)? 16b. A rectangular conducting loop 0.25 m on a side lies in a magnetic field directed into the...
A conducting single-turn circular loop with a total resistance of 2.50 ohm is placed in a time-varying magnetic field that produces a magnetic flux through the loop given by phi_B=a + bt^2 - ct^3 where a= 5.00 Wb, b = 13.5 Wb/s^-2, and c = 5.50 Wb/s^-3. Phi_B is in webers, and t is in seconds. What is the maximum current induced in the loop during the time interval t = 0 to t = 1.84 s?
The magnetic field passing perpendicularly through a square conducting loop of side length 1.0 m as shown decreases linearly from 3.0 T to 1.2 T in 2.5 seconds. What is th induced EMF (in V) and the direction of the induced current? BO
1. A square loop of wire with one side of a and resistance R is placed in a uniform magnetic field of strength B. The field vanishes and results an induced current I in the loop. ( a) a) What is the rate of change of magnetic flux in terms of I and R? (b) Magnetic field B (on the picture above) was equal to 0.5 T before it vanished. If the duration of switch is 0.15 sec and the...
A circular loop of wire of resistance 0.4 Ohm and radius 11 cm, sitting n the plane of this paper, is in a uniform magnetic field, directed out of the paper. A counterclockwise induced current of 3.5 mA is measured in the loop. Is the magnetic field increasing or decreasing as time elapses? Explain how you know. At what rate is the magnetic field changing with time?
A circular conducting loop with radius 2.70 cm is placed in a uniform magnetic field of 0.850 T with the plane of the coil perpendicular to the magnetic field as shown. ! The magnetic field decreases to 0.300 T in a time interval of 25.0 ms. What is the average induced emf in the loop during this interval?
A circular conducting loop with radius 3.50 cm is placed in a uniform magnetic field of 0.650 T with the plane of the coil perpendicular to the magnetic field as shown. в Axis The magnetic field decreases to 0.440 T in a time interval of 32.0 ms. What is the average induced emf in the loop during this interval? mV
Problem 3 Part A A copper wire with resistance 0.010 Ω is shaped into a complete circle of radius R 10 cm and placed in a long solenoid so that the axis of the solenoid and the axis of the wire loop coincide. The current in the solenoid is turned on and then slowly decreased. The magnetic field strength is initially B 0.750 T and subsequently decreases in time at the constant rate -0.035 T/s. (a) Calculate the induced emf...
The figure shows a 22-cm-diameter loop in three different magnetic fields. The loop's resistance is 0.19 ohm. In (Figure 1), what are the size and direction of the induced current? Express your answer to two significant figures and include the appropriate units. The loop current direction is cw. There is no induced current. The loop current direction is cow.
5. A 20-cm diameter circular loop of wire has a resistance of 150.0 12. It is initially in a 0.40-T magnetic field, with its plane perpendicular to the field B. but it is removed from the magnetic field to a region where there is no magnetic field in 100ms. (a) What is the induced current, (both magnitude and direction) [10] (b) What is the power dissipated in the process.