# Varistors are?

Varistors are?

Varistors are non-linear resistors.

## Related questions

Description : Inductance

Description : Resistance

Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

Last Answer : 360 degree . 180 Degree Positive and 180 degree negative

Description : An ideal power supply consist of   (A) Very small output resistance (B) Zero Internal resistance (C) Very large input resistance (D) Very large output resistance

Last Answer : An ideal power supply consist of Zero Internal resistance

Description : When a sine wave has a frequency of 100 Hz in 12 s it goes through? A.1/100 cycle B.12 cycles C.120 cycles D.1,200 cycles

Last Answer : When a sine wave has a frequency of 100 Hz in 12 s it goes through? A.1/100 cycle B.12 cycles C.120 cycles D.1,200 cycles

Description : In order to get maximum power transfer from a capacitive source, the load must? A.have a capacitive reactance equal to circuit resistance B.have an impedance that is the complex conjugate of the source impedance C.be as capacitive as it is inductive D.none of the above

Last Answer : In order to get maximum power transfer from a capacitive source, the load must? A.have a capacitive reactance equal to circuit resistance B.have an impedance that is the complex conjugate of the source impedance C.be as capacitive as it is inductive D.none of the above

Description : Fourteen milliamperes can be expressed as? A.14 MA B.14 μA C.14 kA D.14 mA

Last Answer : Fourteen milliamperes can be expressed as? A.14 MA B.14 μA C.14 kA D.14 mA

Description : How much voltage is needed to produce 2.5 A of current through a 200 ohms resistor? A.50 V B.500 V C.80 V D.8 V

Description : When there is 12 mA of current through a 1.2 k ohms resistor, the voltage across the resistor is? A.14.4 V B.1.4 V C.100 V D.10 V

Last Answer : When there is 12 mA of current through a 1.2 k ohms resistor, the voltage across the resistor is? A.14.4 V B.1.4 V C.100 V D.10 V

Description : How much resistance is needed to draw 17.6 mA from a 12 volt source? A.212 ohms B.6.8 kohms C.68 ohms D.680 ohms

Last Answer : How much resistance is needed to draw 17.6 mA from a 12 volt source? A.212 ohms B.6.8 kohms C.68 ohms D.680 ohms

Description : When placed close together, two positively charged materials will? A.attract B.become neutral C.become negative D.repel

Last Answer : When placed close together, two positively charged materials will? A.attract B.become neutral C.become negative D.repel

Description : The colored bands for a 4,700 ohm resistor with a ten percent tolerance are? A.yellow, violet, red, gold B.yellow, violet, orange, gold C.yellow, violet, red, silver D.orange, violet, red, silver

Last Answer : The colored bands for a 4,700 ohm resistor with a ten percent tolerance are? A.yellow, violet, red, gold B.yellow, violet, orange, gold C.yellow, violet, red, silver D.orange, violet, red, silver

Description : A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt- hours of energy does it consume? A.20.16 kWh B.201.6 kWh C.2.01 kWh D.8.4 kWh

Last Answer : A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt- hours of energy does it consume? A.20.16 kWh B.201.6 kWh C.2.01 kWh D.8.4 kWh

Description : When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is? A.12 V B.120 V C.240 V D.2,400 V

Last Answer : When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is? A.12 V B.120 V C.240 V D.2,400 V

Description : In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is? A.one-fourth the primary current B.four times the primary current C.equal to the primary current D.one-fourth the primary current and equal to the primary current

Last Answer : In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is? A.one-fourth the primary current B.four times the primary current C.equal to the primary current D.one-fourth the primary current and equal to the primary current

Description : In a Y-connected circuit, the magnitude of each line current is? A.one-third the phase current B.three times the corresponding phase current C.equal to the corresponding phase current D.zero

Last Answer : In a Y-connected circuit, the magnitude of each line current is? A.one-third the phase current B.three times the corresponding phase current C.equal to the corresponding phase current D.zero

Description : The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 ohms load. The turns ratio is 3:1. What is the secondary voltage? A.2 V B.20 V C.180 V D.18 V

Last Answer : The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 ohms load. The turns ratio is 3:1. What is the secondary voltage? A.2 V B.20 V C.180 V D.18 V

Description : The turns ratio required to match an 80 ohms source to a 320 ohms load is? A.80 B.20 C.4 D.2

Description : When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is? A.overheated B.shorted C.open D.reversed

Last Answer : When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is? A.overheated B.shorted C.open D.reversed

Description : A resistance of 3.3 M ohms is connected across a 500 V source. The resulting current is approximately? A.15.1 μA B.151 μA C.66 mA D.660 mA

Description : The formula to find I when the values of V and R are known is? A.I = VR B.I = R/V C.V = IR D.I = V/R

Last Answer : The formula to find I when the values of V and R are known is? A.I = VR B.I = R/V C.V = IR D.I = V/R

Description : When converting 0.16 mA to microamperes, the result is? A.16 μA B.160 μA C.1,600 μA D.0.0016 μA

Last Answer : When converting 0.16 mA to microamperes, the result is? A.16 μA B.160 μA C.1,600 μA D.0.0016 μA

Description : The average value of a 12 V peak sine wave over one complete cycle is? A.0 V B.1.27 V C.7.64 V D.6.37 V

Last Answer : The average value of a 12 V peak sine wave over one complete cycle is? A.0 V B.1.27 V C.7.64 V D.6.37 V

Description : Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is? A.16.54 V B.1.65 V C.10.60 V D.5.93 V

Last Answer : Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is? A.16.54 V B.1.65 V C.10.60 V D.5.93 V

Description : A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is? A.0.2 B.0.4 C.5 D.25

Last Answer : A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is? A.0.2 B.0.4 C.5 D.25

Description : If it takes 400 ms to use 12,000 J of energy, the power is? A.30 kW B.30 W C.3 W D.300 kW

Last Answer : If it takes 400 ms to use 12,000 J of energy, the power is? A.30 kW B.30 W C.3 W D.300 kW

Description : A material that does not allow current under normal conditions is a(n)? A.insulator B.conductor C.semiconductor D.valence

Last Answer : A material that does not allow current under normal conditions is a(n)? A.insulator B.conductor C.semiconductor D.valence

Description : Current flows in a circuit when? A.a switch is opened B.a switch is closed C.the switch is either open or closed D.there is no voltage

Last Answer : Current flows in a circuit when? A.a switch is opened B.a switch is closed C.the switch is either open or closed D.there is no voltage

Description : Four amperes of current are measured through a 24 ohms resistor connected across a voltage source. How much voltage does the source produce? A.960 V B.9.6 V C.96 V D.8 V

Last Answer : Four amperes of current are measured through a 24 ohms resistor connected across a voltage source. How much voltage does the source produce? A.960 V B.9.6 V C.96 V D.8 V

Description : You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed? A.9 V B.900 mV C.0 V D.18 V

Last Answer : You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed? A.9 V B.900 mV C.0 V D.18 V

Description : How much resistance is required to limit the current from a 12 V battery to 3.6 mA? A.3.3 k ohms B.33 k ohms C.2.2 k ohms D.22 k ohms

Last Answer : How much resistance is required to limit the current from a 12 V battery to 3.6 mA? A.3.3 k ohms B.33 k ohms C.2.2 k ohms D.22 k ohms

Description : The number of millivolts in 0.06 kilovolts is? A.600 V B.6,000 mV C.60,000 mV D.600,000 mV

Last Answer : The number of millivolts in 0.06 kilovolts is? A.600 V B.6,000 mV C.60,000 mV D.600,000 mV

Description : A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of? B.12 kHz C.18 kHz D.1.3 MHz

Last Answer : A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of? B.12 kHz C.18 kHz D.1.3 MHz

Description : If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ohms? A.250 ohms B.25 ohms C.6,250 ohms D.62,500 ohms

Description : How many watt-hours represent 65 W used for 18 h? A.11.7 Wh B.1,170 Wh C.11,700 Wh D.117,000 Wh

Last Answer : How many watt-hours represent 65 W used for 18 h? A.11.7 Wh B.1,170 Wh C.11,700 Wh D.117,000 Wh

Description : In 0.025 W, there are? A.25 kW B.0.00025 mW C.2,500 μW D.25 mW

Last Answer : In 0.025 W, there are? A.25 kW B.0.00025 mW C.2,500 μW D.25 mW

Description : A two-terminal variable resistor is known as a? A.potentiometer B.thermistor C.rheostat D.wiper

Last Answer : A two-terminal variable resistor is known as a? A.potentiometer B.thermistor C.rheostat D.wiper

Description : The minimum resistance value for a blue, gray, red, silver resistor is? A.612 ohms B.6,120 ohms C.6,800 ohms D.6,460 ohms

Last Answer : The minimum resistance value for a blue, gray, red, silver resistor is? A.612 ohms B.6,120 ohms C.6,800 ohms D.6,460 ohms

Description : Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor? A.4 ohms B.400 ohms C.4 kohms D.4.4 ohms

Last Answer : Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor? A.4 ohms B.400 ohms C.4 kohms D.4.4 ohms

Description : Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k ohms of resistance? A.27.2 mA B.59 mA C.5.9 mA D.590 mA

Last Answer : Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k ohms of resistance? A.27.2 mA B.59 mA C.5.9 mA D.590 mA

Description : When converting 7,000 nA to microamperes, the result is? A.0.007 μA B.0.7 μA C.700 μA D.7 μA

Last Answer : When converting 7,000 nA to microamperes, the result is? A.0.007 μA B.0.7 μA C.700 μA D.7 μA

Description : If the peak value of a sine wave is 30 V, the rms value is? A.19.08 V B.7.07 V C.0.707 V D.23.10 V

Last Answer : If the peak value of a sine wave is 30 V, the rms value is? A.19.08 V B.7.07 V C.0.707 V D.23.10 V

Description : A constant load power means a uniform conversion of? A.mechanical to electrical energy B.electrical to mechanical energy C.current to voltage D.voltage to current

Last Answer : A constant load power means a uniform conversion of? A.mechanical to electrical energy B.electrical to mechanical energy C.current to voltage D.voltage to current

Description : The turns ratio of a transformer having 200 primary turns and 1,200 secondary turns is? A.6 B.24 C.1.66 D.66

Last Answer : The turns ratio of a transformer having 200 primary turns and 1,200 secondary turns is? A.6 B.24 C.1.66 D.66

Description : If you used 600 W of power for 60 h, you have used? A.36 kWh B.3.6 kWh C.10 kWh D.1 kWh

Last Answer : If you used 600 W of power for 60 h, you have used? A.36 kWh B.3.6 kWh C.10 kWh D.1 kWh

Description : If three wires of 3 ohms, 9 ohms and 5 ohms respectively are connected in series, what their resultant resistance? A.10 ohms B.12 ohms C.17 ohms D.5 ohms

Last Answer : If three wires of 3 ohms, 9 ohms and 5 ohms respectively are connected in series, what their resultant resistance? A.10 ohms B.12 ohms C.17 ohms D.5 ohms

Description : A thermistor is a type of? A.switch B.resistor C.battery D.power supply

Last Answer : A thermistor is a type of? A.switch B.resistor C.battery D.power supply

Description : Materials with lots of free electrons are called? A.conductors B.insulators C.semiconductors D.filters

Last Answer : Materials with lots of free electrons are called? A.conductors B.insulators C.semiconductors D.filters

Description : The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately? A.112 ohms B.11.2 ohms C.1.2 ohms D.18 ohms