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.
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
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.
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
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
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 inductance of 0.08 µH is larger than
An inductance of 0.08 µH is larger than
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.
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
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
Three 15 mH inductors are in series. The total inductance is
Three 15 mH inductors are in series. The total inductance 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
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 inductance of 0.08 µH is larger than
An inductance of 0.08 µH is larger than
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 inductance of an iron-core coil decreases if
The inductance of an iron-core coil decreases if
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
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
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
The winding resistance of a coil can be increased by
The winding resistance of a coil can be increased by
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?
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
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?
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 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
An induced voltage is produced as a result of a dc voltage.
An induced voltage is produced as a result of a dc voltage.
An induced voltage is produced as a result of a dc voltage.
An induced voltage is produced as a result of a dc voltage.
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
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 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 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
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
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.
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.
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?
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.
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
The winding resistance of a coil can be increased by
The winding resistance of a coil can be increased by
Energy is stored by an inductor in an electrostatic field.
Energy is stored by an inductor in an electrostatic field.
Three 15 mH inductors are in series. The total inductance is
Three 15 mH inductors are in series. The total inductance 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
A 240 µH inductor is equivalent to a
A 240 µH inductor is equivalent to a
The inductance of an iron-core coil decreases if
The inductance of an iron-core coil decreases if
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?
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.
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 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
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
Energy is stored by an inductor in an electrostatic field.
Energy is stored by an inductor in an electrostatic field.
Inductors add in parallel.
Inductors add in parallel.
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.
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 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
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.
An inductance of 0.43 mH is smaller than
An inductance of 0.43 mH is smaller than
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.
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 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 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 240 µH inductor is equivalent to a
A 240 µH inductor is equivalent to a
XL is directly proportional to frequency and inductance.
XL is directly proportional to frequency and inductance.
