When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
XL is directly proportional to frequency and inductance.
XL is directly proportional to frequency and inductance.
An inductance of 0.43 mH is smaller than
An inductance of 0.43 mH is smaller than
All coil cores are made of iron.
All coil cores are made of iron.
A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
XL is directly proportional to frequency and inductance.
XL is directly proportional to frequency and inductance.
The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is
The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is
The winding resistance of a coil can be increased by
The winding resistance of a coil can be increased by
Five inductors are connected in series. The lowest value is 8 µH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is
Five inductors are connected in series. The lowest value is 8 µH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is
When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
An inductance of 0.43 mH is smaller than
An inductance of 0.43 mH is smaller than
Inductors add in parallel.
Inductors add in parallel.
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
An inductor, a 1 kΩ resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
An inductor, a 1 kΩ resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?
Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?
An inductor, a 1 kΩ resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
An inductor, a 1 kΩ resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
The winding resistance of a coil can be increased by
The winding resistance of a coil can be increased by
Inductance is the property of an inductor that produces an opposition to any change in current.
Inductance is the property of an inductor that produces an opposition to any change in current.
Faraday's law states that relative motion between a magnetic field and a coil induces a voltage across the coil.
Faraday's law states that relative motion between a magnetic field and a coil induces a voltage across the coil.
An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is
An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
The term 'choke' is more commonly used in connection with an inductor used to block off high frequencies.
The term 'choke' is more commonly used in connection with an inductor used to block off high frequencies.
Five inductors are connected in series. The lowest value is 8 µH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is
Five inductors are connected in series. The lowest value is 8 µH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is
An inductance of 0.08 µH is larger than
An inductance of 0.08 µH is larger than
Two inductors, L1 and L2, are in parallel. L1 has a value of 25 µH and L2 a value of 50 µH. The parallel combination is in series with L3, a 20 µH coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is
Two inductors, L1 and L2, are in parallel. L1 has a value of 25 µH and L2 a value of 50 µH. The parallel combination is in series with L3, a 20 µH coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is
Inductance is indirectly proportional to the square of the number of turns, the permeability, and the cross-sectional area of the core.
Inductance is indirectly proportional to the square of the number of turns, the permeability, and the cross-sectional area of the core.
Inductance is indirectly proportional to the square of the number of turns, the permeability, and the cross-sectional area of the core.
Inductance is indirectly proportional to the square of the number of turns, the permeability, and the cross-sectional area of the core.
A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?
A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?
An induced voltage is produced as a result of a dc voltage.
An induced voltage is produced as a result of a dc voltage.
The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
A 240 µH inductor is equivalent to a
A 240 µH inductor is equivalent to a
The term 'choke' is more commonly used in connection with an inductor used to block off high frequencies.
The term 'choke' is more commonly used in connection with an inductor used to block off high frequencies.
Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?
Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?
The following coils are in parallel: 75 µH, 40 µH, 25 µH, and 15 µH. The total inductance is approximately
The following coils are in parallel: 75 µH, 40 µH, 25 µH, and 15 µH. The total inductance is approximately
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
A 320 µH coil is in series with a 3.3 kΩ resistor. How long does it take for current to build up to its full value?
A 320 µH coil is in series with a 3.3 kΩ resistor. How long does it take for current to build up to its full value?
A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?
A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?
An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
Faraday's law states that relative motion between a magnetic field and a coil induces a voltage across the coil.
Faraday's law states that relative motion between a magnetic field and a coil induces a voltage across the coil.
Three 15 mH inductors are in series. The total inductance is
Three 15 mH inductors are in series. The total inductance is
An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is
An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is
An induced voltage is produced as a result of a dc voltage.
An induced voltage is produced as a result of a dc voltage.
The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
Two inductors, L1 and L2, are in parallel. L1 has a value of 25 µH and L2 a value of 50 µH. The parallel combination is in series with L3, a 20 µH coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is
Two inductors, L1 and L2, are in parallel. L1 has a value of 25 µH and L2 a value of 50 µH. The parallel combination is in series with L3, a 20 µH coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is
The voltage across a coil when di/dt = 20 mA/µs and L = 8 µH is
The voltage across a coil when di/dt = 20 mA/µs and L = 8 µH is
Energy is stored by an inductor in an electrostatic field.
Energy is stored by an inductor in an electrostatic field.
A 320 µH coil is in series with a 3.3 kΩ resistor. How long does it take for current to build up to its full value?
A 320 µH coil is in series with a 3.3 kΩ resistor. How long does it take for current to build up to its full value?
The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is
The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is
The voltage across a coil when di/dt = 20 mA/µs and L = 8 µH is
The voltage across a coil when di/dt = 20 mA/µs and L = 8 µH is
The inductance of an iron-core coil decreases if
The inductance of an iron-core coil decreases if
Inductors add in parallel.
Inductors add in parallel.
Three 15 mH inductors are in series. The total inductance is
Three 15 mH inductors are in series. The total inductance is
The following coils are in parallel: 75 µH, 40 µH, 25 µH, and 15 µH. The total inductance is approximately
The following coils are in parallel: 75 µH, 40 µH, 25 µH, and 15 µH. The total inductance is approximately
A 240 µH inductor is equivalent to a
A 240 µH inductor is equivalent to a
An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
Inductance is the property of an inductor that produces an opposition to any change in current.
Inductance is the property of an inductor that produces an opposition to any change in current.
Energy is stored by an inductor in an electrostatic field.
Energy is stored by an inductor in an electrostatic field.
An inductance of 0.08 µH is larger than
An inductance of 0.08 µH is larger than
The inductance of an iron-core coil decreases if
The inductance of an iron-core coil decreases if
All coil cores are made of iron.
All coil cores are made of iron.
