formula for Farday law of induction is
e = -L dI/dt
L = -e/ dI/dt
= -10.3 mV/(3.2A-5.2A)/2.99 s
=15.39 mH
=15.4 mH ( 1 decimal point)
The current in a coil changes from 5.2 A to 3.2 A in the same direction...
The current in a coil drops from 3.7 A to 2.6 A in 0.49 s. If the average emf induced in the coil is 12 mV, what is the self-inductance of the coil?
An EMF of 0.524 V is induced across a coil when the current through it changes uniformly from 0.10 to 0.60 A in 0.597 s. What is the self-inductance of the coil? .60 A in 0.597 s. What is the self-inductance of t
ogf induced in a coil is 0.72 V when the current in the coil changes to 1.6 A in 0.25 s. What is the self-inductance L of the coil? An alternating voltage with a peak voltage of 12 V and a frequency 60 Hz is connected in series to a resistor with resistance R : 10 ?, a capacitor with capacitance C-1000 ?F, and an inductor with inductance L 500 mH. Determine the root-mean-square current in the circuit. (a)
A coil has 460 turns and self-inductance 7.50 mH. The current in the coil varies with time according to i=(680mA)cos[πt/(0.0250s)]. What is the maximum emf induced in the coil? What is the maximum average flux through each turn of the coil? At t=0.0180 s, what is the magnitude of the induced emf?
The current through a square coil of wire connected to a power supply is changed from 3.6 A to 1.9 A in 0.53 s. Determine the self-inductance of the coil if the average induced emf due to this change in current is 10 mV. L= H
The current in a 70.0-mH inductor changes with time as i = 2.00ẹ-7.00t, where i is in amperes and t is in seconds. (a) Find the magnitude of the induced emf at t 1.00 s mV (b) Find the magnitude of the induced emf at t- 4.00 s. mV (c) At what time is the emf zero?
10. A coil has 400 turns and self-inductance 4.80 mH. The current in the coil varies with time according to i=(680mA)cos(att/0.0250s). (a) What is the maximum emf induced in the coil? (b) What is the maximum average flux through each turn of the coil? (c) At t= 0.0180 s, what is the magnitude of the induced emf?
3. + -3.33 points SerPSE10 31. 1.ΟΡ.004 The current in a 70.0-mH inductor changes with time as i = 4.00t -7.00t, where i is in amperes and t is in seconds. (a) Find the magnitude of the induced emf at t- 1.00s. mV (b) Find the magnitude of the induced emf at t4.00 s. mV (c) At what time is the emf zero? Need Help? LReadIt İDwatchitu
Only question ii thanks e) The current in a 150 mH air-cored coil changes steadily from 5.0 A to 15.0 A in 200 ms. (i) What is the average self-induced emf across the terminals of the coil during this change? (ii) How would this result change if the core of the coil were replaced by iron, with relative permeability Mr = 200?
a)During a 82-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 4.2-mA current in a nearby secondary coil. The secondary coil is part of a circuit in which the resistance is 12 Ω. The mutual inductance between the two coils is 3.2 mH. What is the change in the primary current? b) The magnetic flux that passes through one turn of a 13-turn coil of wire changes to 3.78...