Question

1)The current in a 60.0-mH inductor changes with time as i = 4.00t2 − 7.00t, where...

1)The current in a 60.0-mH inductor changes with time as i = 4.00t2 − 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.

(b) Find the magnitude of the induced emf at t = 4.00 s.

(c) At what time is the emf zero?

2)A 499-turn solenoid has a radius of 7.10 mm and an overall length of 15.4 cm.

(a) What is its inductance?

(b) If the solenoid is connected in series with a 2.50-Ω resistor and a battery, what is the time constant of the circuit?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

CHECK IT AND DO RATE

0 0
Know the answer?
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
Similar Questions
The current in a 70.0-mH inductor changes with time as i = 4.00t2 ? 8.00t, where...
The current in a 70.0-mH inductor changes with time as i = 4.00t2 ? 8.00t, where i is in amperes and t is in seconds. (a) Find the magnitude of the induced emf at t = 1.00 s. in mV (b) Find the magnitude of the induced emf at t = 4.00 s. in mV (c) At what time is the emf zero? in s
An inductor made as a solenoid of 300 turn with 5.00 cm long and 1.00 x10-4...
An inductor made as a solenoid of 300 turn with 5.00 cm long and 1.00 x10-4 m^2 cross section area is connected to a 75 resistor and 12 V battery. The switch is closed at time t = 0. (a) What is the inductive time constant of the circuit? (b) Calculate the current in the circuit 250 us after the switch is closed. (c) What is the magnitude and polarity of the back emf induced by the inductor 250 us...
A series RLC circuit consists of a 40.0 Ω resistor, a 2.70 mH inductor, and a...
A series RLC circuit consists of a 40.0 Ω resistor, a 2.70 mH inductor, and a 410 nF capacitor. It is connected to a 3.0 kHz oscillator with a peak voltage of 6.00 V. A. What is the instantaneous emf when i =I? B. What is the instantaneous emf  when i =0 A and is decreasing? C. What is the instantaneous emf  when i =−I?
A 1.3-kΩ resistor and 26.3-mH inductor are connected in series to a Vrms = 120 V...
A 1.3-kΩ resistor and 26.3-mH inductor are connected in series to a Vrms = 120 V AC power source oscillating at a frequency of f = 60 Hz. The voltage as a function of time is given by V = V0cos(ωt), where V0 is the amplitude, ω is the angular frequency. Part (a) What is the amplitude of the source voltage, in volts? Part (b) Enter an expression for the impedance of the circuit in terms of R, L, f,...
A 82-mH solenoid inductor is wound on a form 0.80 m in length and 0.10 m...
A 82-mH solenoid inductor is wound on a form 0.80 m in length and 0.10 m in diameter. A coil is tightly wound around the solenoid at its center. The coil's resistance is 7.9 ohms. The mutual inductance of the coil and solenoid is 88 μH. At a given instant, the current in the solenoid is 480 mA, and is decreasing at the rate of 2.5 A/s. At the given instant, what is the magnitude of the induced current in...
a)Assume that there is a long ideal solenoid with 120 turns/cm. It carries a current i=...
a)Assume that there is a long ideal solenoid with 120 turns/cm. It carries a current i= 2 A and it has a diameter 2 cm and a length 5 m. Find the uniform magnetic field inside the solenoid. b) Insert a single circular coil at the center of the long ideal solenoid that is mentioned at part (a). Solenoid and coil are coaxial. Coil has diameter 0.5 cm. Now the current in the solenoid decreases steadily from 2 A to...
An inductor (0.2 Henry) and a resistor (2ohms) are connected in series with a battery of...
An inductor (0.2 Henry) and a resistor (2ohms) are connected in series with a battery of EMF 5.0 volts. a) Draw the circuit (don't forget the switch) b) At time t=0 and time= infinity find the current that passes through the battery c) What's the time constant for the circuit? d) What's the back EMF provided by the inductor at t= 1.0 sec? e) What's instantaneous energy saved in the inductor at time t= 1.0 sec? f) What is the...
A 23-Ω resistor, 58-μF capacitor, and 3.5-mH inductor are connected in series with an AC source...
A 23-Ω resistor, 58-μF capacitor, and 3.5-mH inductor are connected in series with an AC source of amplitude 12 V and frequency 120 Hz. Part (h) With a source voltage of Vsource = V0 cos(2πft), what is the instantaneous voltage, in volts, across the capacitor at time t = 2.25 s? Part (i) What is the amplitude of the voltage drop across the inductor, in volts? Part (j) With a source voltage of Vsource = V0cos(2πft), what is the instantaneous...
An inductor with an inductance of 2.00 H and a resistance of 7.90 Ω is connected...
An inductor with an inductance of 2.00 H and a resistance of 7.90 Ω is connected to the terminals of a battery with an emf of 5.80 V and negligible internal resistance. A) Find the initial rate of increase of current in the circuit. B) Find the rate of increase of current at the instant when the current is 0.540 A . C) Find the current 0.280 s after the circuit is closed. D) Find the final steady-state current.
A circuit has a 2.9 V battery connected in series with a switch. When the switch...
A circuit has a 2.9 V battery connected in series with a switch. When the switch is closed, the battery powers two paths in parallel, one of which has a resistor of resistance R1 = 80 Ω in series with an inductor of inductance L = 1×10−2 H , while the other has a resistor of resistance R2 = 230 Ω . What is the current supplied by the battery at a time t = 0.25 ms after the switch...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT