A transformer is designed to step down the 220 V. line voltage to 21 V. If there are 1,514 turns on the input coil, how many turns should there be on the output coil?

Q: A hair dryer uses 505 W of power. If the hair dryer is using 8 A of current, what is the voltage (in…

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Q: An electric water heater uses 13 amperes of current when plugged into a 110-volt outlet. How much…

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Q: The charger cord used to recharge a cell phone contains a transformer that reduces 240 V AC to 4 V…

A: Vp = primary voltage (voltage on the input coil of transformer); Vs = secondary voltage (voltage…

Q: The current in an electric lamp is 5 amperes. How much charge (in Coulomb) will flow toward its…

A: Given data:  Current (I) = 5 A Time (t) = 6 minutes Required: The amount of charge flows (q)

Q: What current will be taken by a 920 W appliance if the supply voltage is 230 V ?

A: Given data :                       Power  =  P                     Voltage  =  V          To find :…

Q: The primary coil of a transformer with 954 turns carries an EMF of 2.2. If the secondary coil has…

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Q: A transformer is designed to step down the 220 V. line voltage to 31 V. If there are 1115 turns on…

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Q: A transformer with a 120 V input voltage has 2000 turns of wire on the input coil and 197 turns of…

A: The expression for the output voltage is,

Q: The charger cord used to recharge a cell phone contains a transformer that reduces 240 V AC to 4 V…

A:

Q: a transformer has a primary coil with 5000 windings and a secondary coul with 100,000 windings. if…

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Q: a transformer has 20 turns in its primary could and 500 turns in its secondary coil. if the primary…

A: calculation

Q: The charger cord used to recharge a cell phone contains a transformer that reduces 120 V AC to 4 V…

A: Given data The input voltage to the transformer is: V1  = 120 V The output voltage to the…

Q: Three 20-Ohm light bulbs are wired in parallel. If they are connected to a 10 V potential…

A: Resistance, R = 20 Ω (three in parallel)  Voltage, V = 10 V  Current, I = ?

Q: How much heat will be released in the winding of an electric motor in 25 minutes if its active…

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Q: If a blender is plugged into a 110 V outlet that supplies 2.7 A of current, what amount of power is…

A: Given data:  Voltage (V) = 110 V Current (I) = 2.7 A Required: Power (P)

Q: A transformer has a primary with 4000 windings and a secondary coil with 78,000 windings. If the…

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Q: What is the Voltage needed to have 10 amps of current pass through a 4 ohm resistor?

A: Required : Voltage required.

Q: How much current would a 10-2 bread toaster draw when connected to a 110-V outlet?

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Q: The charger cord used to recharge a cell phone contains a transformer that reduces 120 V AC to 5 V…

A: Primary voltage , Vp = 120 V Secondary voltage , Vs = 5 V  Number of turns in input coil, np = 1425…

Q: How much current is “drawn” by a 75 W lightbulb connected to a 120 V outlet?

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Q: The transformer on a model train set steps down the voltage from 120 Volts to 9.0 Volts. If the…

A: Voltage of primary coil , Vp = 120 V Voltage of secondary coil , Vs = 9 V Number of turns on…

Q: A transformer with primary 712 windings and 5,275 secondary windings has an input voltage of 101 AC.…

A: Np=712Ns=5275Vp=101 AC

Q: A transformer is designed to step down the 220 V. line voltage to 47 V. If there are 1,711 tums on…

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Q: What is the total resistance when 10 resistors are put in parallel if each of them individually has…

A: When 10 resistors of equal resistance are put in parallel, 1Req=1R+1R+.....+1R10times1Req=10RReq=R10

Q: A transformer with primary 510 windings and 5,825 secondary windings has an input voltage of 137 AC.…

A: Given data: Number of primary windings, Np=510 Number of secondary windings, Ns=5825 Input voltage,…

Q: A transformer is designed to step down the 220 V. line voltage to 8 V. If there are 1.753 turns on…

A: Primary Voltage, Vp=220 V  Secondary Voltage, Vs=8 V Input coil turns, Np=1.753 Let Ns be the no of…

Q: What is the current in a 40-watt bulb when it is connected to a 220-V outlet?

A: The power input required in a circuit is defined as the product of the voltage drop across the…

Q: A transformer with 915 primary windings and 7,780 secondary windings has an input voltage of 155 AC.…

A: Data Given ,  No. Of primary windings ( Np ) =915 No. Of secondary windings ( Ns ) = 7780  Input…

Q: If a simple circuit is connected in series with one 4-Volt battery and one 8-ohm resistor, what is…

A: According to ohm law V = I*R Here V= Voltage(volt) I= Current(Ampere) R=Resistance(ohm)

Q: A transformer is designed to step down the 220 V. Line voltage to 39 If there are 1,976 turns on the…

A: A transformer is an electrical device which transform or convert one voltage level to another. It…

Q: A transformer is used to lower the supply voltage from 240V to 3V lamp. If the number of turns on…

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Q: How much power does a 9.0-volt Circuit use that has a 1.0-amp current flowing through it?

A: (given) Voltage (V) = 9 V  Current (I) = 1.0 A Power is  P=Work time   =WtAndP=(Voltage)×(Current)…

Q: If the coils of a heater have a resistance of 12 ohm, how much current does it draw when plugged…

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Q: What current will be taken by a 1100 W appliance if the supply voltage is 260 V ?

A: Given data :                   Power  =  P                 Voltage  =  V      To find :…

Q: A 10-ohm resistor has a constant current. If 1,200 C of charge flow through it in 4 minutes what is…

A: Given data:  Charge (q) = 1200 C Time (t) = 4 min = 240 seconds Required: Current (I)

Q: The charger cord used to recharge a cell phone contains a transformer that reduces 120 V AC to 5 V…

A: Given: The voltage in the primary coil is 120 V. The voltage in the secondary coil is 5 V. The…

Q: What is the power dissipated in a circuit if there is 3.0 N of resistance and there is 5.0 A of…

A: Answer             C) 75W solution We know that The power dissipated in the circuit is P= I2R Here I…

Q: What is the resistance of a bulb if the current in it is 1.25 A when a 4 V voltage supply is…

A: It is given that, I=1.25 AV=4 V The resistance in bulb, using ohm's law is, V=IRR=VI=41.25=3.2 Ω

Q: A transformer has a primary coil with 6000 windings and a secondary coil with 120,000 windings.  If…

A: Given value--- Number of turns in primary coil = 6000. Number of turns in secondary coil = 12000 .…

Q: A voltage of 220 volts enters a transformer with 150 turns of coil on the primary side. If an…

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Q: The current is 25 A and the voltage is 500 V. Which is the power?

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Q: What is the charge of an atom with 16 protons and 18 electrons?

A: We know that charge of 1 proton is 1.6022 x 10-19 coulomb                     charge of  1 electron…

Q: A transformer is connected to a 120 V input voltage. There are 228 turns of wire on the input coil.…

A: the relation between the voltages and numbr of turns in a transformer is

Q: What’s the voltage of a battery in a circuit with resistance of 3 ohms and current of 5 amps?

A: Given Resistance , R = 3 ohm's Current , I = 5 A To find  Voltage of a battery

Q: A heating element in a stove is designed to receive 3,345 W when connected to 240 V.  Calculate the…

A: The resistance of the device is,

Q: A transformer is designed to step down the 220 V. line voltage to 16 V. If there are 1,067 turns on…

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Q: The charger cord used to recharge a cell phone contains a transformer that reduces 240 V AC to 4 V…

A: