Exercise 2: (8 pts) A coil of 40 mH is crossed by a current of 2...
Exercise 2: (8 pts) A coil of 40 mH is crossed by a current of 2 A. The coil is connected to a resistance of 25 Ω while the current is falling. (a) What is the time constant τ of the circuit? (b) What is the current in the coil after a time of 1.6 ms? (c) What is the voltage across the resistor after 1.6 ms? (d) What is the voltage across the coil after 1.6 ms?
Homework Answers
12. An emf of 96.0 mV is induced in the windings of a coil when the...
12. An emf of 96.0 mV is induced in the windings of a coil when the current in a nearby coil is increasing at the rate of 1.20 A/s. What is the mutual inductance of the two coils? A. 12mH B. 20 mH C.40 mH D. 80 mH For items 13-15 consider the RL circuit shown at left with the following values ε-12.OV, R ; 6.0 Ω and Le 30.0 mH. Switch s L is set at position a at...
A certain LR circuit with a battery has an inductor with L = 37 mH &...
A certain LR circuit with a battery has an inductor with L = 37 mH & τ = 6 ms. It is known that when t = 12 ms, I = 0.11 A. Determine the resistance of the resistor and the voltage of the battery. The armature of a 60 Hz ac generator rotates in a 0.19 T B-field. If the area of the coils is 0.03 m2, how many loops must the coil contain if the peak output is...
ogf induced in a coil is 0.72 V when the current in the coil changes to...
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)
resistor a switch, and a 12 V battery 7) A 20 mH coil inductor is connected...
resistor a switch, and a 12 V battery 7) A 20 mH coil inductor is connected in series with a) (5 pts) What is the time constant of the circuit? b) (10 pts) How long after the switch is closed will it take for the current to reach 99 percent of final value? e) (5 pts) A long time after the switch is closed, what is the energy stored in the coil? W 10000
A resistor of 15 and a coil are connected in series with a 6.30V battery with...
A resistor of 15 and a coil are connected in series with a 6.30V battery with negligible internal resistance and a closed switch. At the instant of 2.00 ms after opening the circuit the current is 0.210A, the inductance of the coil is: a. 94.5 H b. 13.3 mH c. 42.0 mH d. 43.3 mH
Q2) A coil has a resistance of 4 ohms and an inductance of 9.55 mh connected...
Q2) A coil has a resistance of 4 ohms and an inductance of 9.55 mh connected in parallel. Calculate a) the reactance, b) the impedance, c) the current taken across both resistor and inductor, d) total current Supply voltage is 220V and frequency is 50 Hz
A circuit consists of a 11.4-mH coil, a 19- Ω resistor, a 5.0- Ω resistor, a...
A circuit consists of a 11.4-mH coil, a 19- Ω resistor, a 5.0- Ω resistor, a 10-V battery and a switch, all in series. What is the time constant of this circuit?
At the moment t = 0, a 27.0 V battery is connected to a 5.00 mH...
At the moment t = 0, a 27.0 V battery is connected to a 5.00 mH coil and a 6.00 Ω resistor. (a) Immediately thereafter, how does the potential difference across the resistor compare to the emf across the coil? (Enter your answers in V.) (b) Answer the same question about the circuit several seconds later. (Enter your answers in V.) (c) Is there an instant at which these two voltages are equal in magnitude? Yes (d) If so, when?...
(a) What is the characteristic time constant of a 24.8 mH inductor that has a resistance...
(a) What is the characteristic time constant of a 24.8 mH inductor that has a resistance of 3.92 Ω? ms (b) If it is connected to a 12.0 V battery, what is the current after 12.5 ms?
Exercise 3: (1.5 pts) A capacitor of capacitance 0.01 uF is connected to a DC voltage...
Exercise 3: (1.5 pts) A capacitor of capacitance 0.01 uF is connected to a DC voltage source of emf s. When the capacitor becomes fully charged, the battery is removed from the circuit and the capacitor is connected to a resistor of resistance R. What is the resistance R if the charge reaches 25% of its initial value in 2 ms?
12. An emf of 96.0 mV is induced in the windings of a coil when the current in a nearby coil is increasing at the rate of 1.20 A/s. What is the mutual inductance of the two coils? A. 12mH B. 20 mH C.40 mH D. 80 mH For items 13-15 consider the RL circuit shown at left with the following values ε-12.OV, R ; 6.0 Ω and Le 30.0 mH. Switch s L is set at position a at...
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)
resistor a switch, and a 12 V battery 7) A 20 mH coil inductor is connected in series with a) (5 pts) What is the time constant of the circuit? b) (10 pts) How long after the switch is closed will it take for the current to reach 99 percent of final value? e) (5 pts) A long time after the switch is closed, what is the energy stored in the coil? W 10000
Q2) A coil has a resistance of 4 ohms and an inductance of 9.55 mh connected in parallel. Calculate a) the reactance, b) the impedance, c) the current taken across both resistor and inductor, d) total current Supply voltage is 220V and frequency is 50 Hz
Exercise 3: (1.5 pts) A capacitor of capacitance 0.01 uF is connected to a DC voltage source of emf s. When the capacitor becomes fully charged, the battery is removed from the circuit and the capacitor is connected to a resistor of resistance R. What is the resistance R if the charge reaches 25% of its initial value in 2 ms?
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