The doorbell on your house requires a 12 volt alternating current. A transformer having a primary winding of 1,600 turns is to be used to step down your house's 110-volt alternating current. How many turns are there on the secondary winding?

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: A wave with a wavelength of 1.6 meters and a frequency of 1.2 Hz is traveling in a medium. If the…

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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 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: A furnace for an electric heating system is rated at 121 amperes and 27,500watts. What is the…

A: Given: The current is 121 A. The power is 27500 W.

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

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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: 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 clown in a circus swings back and forth on a long rope. If the clown makes 35 complete swings in…

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Q: What is the frequency of a radio wave with a wavelength of 0.5 m?

A: Given data Wave length = 0.5 m Speed = 3×108m/s Frequency =?

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

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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: 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 primary transformer has a voltage of 240V and number of revolutions 500 turns, what is the…

A: Given data:  Primary voltage (Vp) = 240 V Number of turns in primary winding (Np) = 500 Number of…

Q: An electric generator produces 200 kW of power and delivers the electricity at 6,500-V. How much…

A: Power is the product of current and voltage.  Calculate the current corresponding to both the…

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: 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: The price of diesel at a particular station is 1.3 dollar per liter. An American student can use 41…

A: Given:The price of diesel at a particular station is 1.3 dollar per liter. An American student can…

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: A 1,100-g mass is placed 75 cm from the fulcrum of a lever. How far from the fulcrum (in cm) is a…

A: GivenFor mass 1Mass, m1=1100 gDistance from fulcrum, d1=75 cmAndFor ,mass 2Mass, m2=1650 gDistance…

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: A transformer is designed to step down the 220 V. line voltage to 21 V. If there are 1,514 turns on…

A: The input voltage Vi= 220 V The number of turns in input windings Ni=1514 turns The output voltage…

Q: There is a current of 0.73 Amps through a light bulb in a 120 Volt circuit. What is the resistance…

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Q: What resistance would produce a current of 200 amperes with a potential difference of 2,000 volts

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

Q: If a wire 1,625 feet long has a resistance of 0.85 ohm, what is the resistance to the nearest tenth…

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Q: A wave has a frequency of 66 Hz and a wavelength of 1.1 meters. What is the speed of this wave?

A: The frequency of a wave is defined as the number of waves passing through a point in space per unit…

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

A: The output voltage, NpNs=VpVsVs=VpNsNp

Q: The current in a 120-V reading lamp is 2.6 A. If the cost of electrical energy is $0.075 per…

A: Given data The potential difference across the lamp is Vo=120 V The current in the lamp is Io=2.6 A…

Q: Suppose you use 57 kWh (kilowatt hours) of electricity at $0.35 per kWH, 91 kWh at $0.26 per kWh,…

A: Given, Electricity usage,  57 kWh of electricity at $0.35 per kWh, 91kWh of electricity at $0.26 per…

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

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Q: Dominic leaves a lamp on that uses 3 40W light bulbs. If it stayed on ALL DAY for the entire month…

A: Given data Power of light bulb is ∆P=340 W Cost is $0.141 per kWh Find the power bill.

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: What is the primary voltage of a transformer if the ratio is 20:1 and the secondary voltage is 240…

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Q: What is the output voltage of a transformer that has 2,365 turns in the primary coil and 4,081 turns…

A: Given No of turns on primary coil Np=2365 turns No of turns in secondary Ns=4081 turns Primary…

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 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…

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