ZuoTi.Pro
Question

The current in a 60.0-mH inductor changes with time as i = 3.00t2 − 7.00t, where...

The current in a 60.0-mH inductor changes with time as i = 3.00t2 − 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?

=_____s

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

V(t) = L(dI/dt)
V(t) = (60.0e-3 H)(6t - 7 s)

(a) V(1) = (60.0e-3 H)(6 - 7 s)
V(1) = -0.06 V

(b) V(4) = (60.0e-3 H)(6*4 - 7 s)
V(4) = +1.02 V

(c) 0 = (60.0e-3 H)(6t - 7 s)
0 = 6t - 7
t = 7/6 s

0 0
Add a comment
Know the answer?
Add Answer to:
The current in a 60.0-mH inductor changes with time as i = 3.00t2 − 7.00t, where...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • The current in a 70.0-mH inductor changes with time as i = 2.00ẹ-7.00t, where i is...

    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?

  • 3. + -3.33 points SerPSE10 31. 1.ΟΡ.004 The current in a 70.0-mH inductor changes with time...

    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

  • The current in a 6.00 mH-inductor varies in time as shown. Construct a graph of the...

    The current in a 6.00 mH-inductor varies in time as shown. Construct a graph of the self-induced emf across the inductor over the time interval t= 0 to t= 12.0 ms i (mA) 3 2 1 (ms) 2 4 6 8 10 12 -1 -2

  • 2. A 33-mH inductor is directly connected to a varying current supply. a. During a “ramp...

    2. A 33-mH inductor is directly connected to a varying current supply. a. During a “ramp up” period of 40. ms, the current through the inductor increases linearly from 0.50 to 1.00 A. What is the average emf induced across the inductor during this time period? A. 0.19 V D. 0.41 V B. 0.26 V E. 0.52 V C. 0.33 V b. The self-induced emf (across the inductor) will be... A. in the same direction as the current B. opposite...

  • The current increases from 15 mA to 60 mA in a 50 mH inductor over 10...

    The current increases from 15 mA to 60 mA in a 50 mH inductor over 10 s. What is the induced emf across the inductor? (in V) Inductance is when a change in the current flowing through a circuit produces an induced emf voltage ε-L Δ1 /At that opposes the change L is inductance, I is current, t is time Submit Answer Incorrect. Tries 1/2 Previous Tries Post Discussion Send Feedback

  • The current i through a 5.1 H inductor varies with time t as shown by the...

    The current i through a 5.1 H inductor varies with time t as shown by the graph of the figure. The inductor has a resistance of 17 2. Find the magnitude of the induced emf ε during the time intervals (a) t = 0 to 2 ms; (b) 2 ms to 5 ms, and (c) 5 ms to 6 ms. (Ignore the behavior at the ends of the intervals.) 6 n 2 0 4 6 2 1 (ms) (a) Number...

  • Problem 4. A 10 mH inductor has a sudden current change from 200 mA to 100...

    Problem 4. A 10 mH inductor has a sudden current change from 200 mA to 100 mA in 1 ms. Find the induced voltage. Problem 5. A induced voltage across a 10 mH inductor is v(t) 120 cos (377t) V. Find (a) the expression for the inductor current and (b) the expression for the power. The current in a 25 mH inductor is given by the expressions: i(t) 0 i(t) 10 (1-e) mA Find the voltage across the inductor and...

  • In a particular inductor, the magnetic flux through each of its 85 turns is measured to...

    In a particular inductor, the magnetic flux through each of its 85 turns is measured to be 3.30 milliWeber when the current through the inductor is 1.60 Amperes. After making this measurement, the current through the inductor is then varied as                 i(in Amperes) = 1.60 + 3t 5/3   -   2 t2 (where t is in seconds). What is the average emf across the inductor between two and three seconds? What is the energy stored in the inductor when t...

  • The current in a 200 mH inductor is i = 75 mA, t < 0; -50+...

    The current in a 200 mH inductor is i = 75 mA, t < 0; -50+ i= (B1 cos 200t + B2 sin 200t) e A, t>0, where t is in seconds. The voltage across the inductor (passive sign convention) is 4.25 V at t = 0. Part A Calculate the power at the terminals of the inductor at t = 28 ms Express your answer to three significant figures and include the appropriate units. μΑ p = Value Units...

  • Chapter 30, Problem 046 The current i through a 6.5 H inductor varies with time t...

    Chapter 30, Problem 046 The current i through a 6.5 H inductor varies with time t as shown by the graph of the figure. The inductor has a resistance of 14 2. Find the magnitude of the induced emf = during the time intervals (a) t = 0 to 2 ms; (b) 2 ms to 5 ms, and (c) 5 ms to 6 ms. (Ignore the behavior at the ends of the intervals.) 6 34 2 0 4 6 2...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT