There are approximately 103 million TVs in the United States. Each uses, on average, 76 W of power and is turned on for 6.5 hours a day. If electrical energy costs 0.093 dollars per kWh., how much money is spent every day in keeping the TVs turned on?

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…

A:

Q: An electric clothes dryer is rated at 5,400 W. How much energy does it use in 25 min?   kWh

A:

Q: How much power is consumed by a 10 Ω light bulb connected to a 12 V battery?

A: Given : Resistance of a bulb (R) = 10 Ω Voltage of a battery (V) = 12 V

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

A:

Q: An electric clothes dryer is rated at 2,200 W. How much energy does it use in 45 min?

A: Write the formula for power.

Q: What is the total circuit resistance when resistive elements of 5, 10, 15, and 20 Ω are connected in…

A:

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 does it cost to run a 1500-W hair dryer for 27 minutes each day for one month (30 days) at…

A:

Q: How much power does a standard wall outlet produce? Current is 5 amps, and voltage 120 volts?

A:

Q: How much power is used by a contact lens heating unit that draws 0.04 A of current from a 194 V…

A: Given data:  Current (I) = 0.04 A Voltage (V) = 194 V Required: Power (P)

Q: How much does it cost to run a 1500-W hair dryer for 29 minutes each day for one month (30 days) at…

A: Total Power ( P ) = 1500 W = 1.5 kWatts Time = 29 minutes each day for 30 days Total Minutes of…

Q: There are approximately 103 million TVs in the United States. Each uses, on average, 71 W of power…

A: Given: The number of TVs is 103 million. The average power used by each TV is 71 W. The number of…

Q: What is the current (in amperes) drawn by an 840 W toaster attached to a 120 V outlet?

A: Given that            The power of the toaster is (P) = 840W            The voltage (V) = 120V We…

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 is “drawn” by a 75 W lightbulb connected to a 120 V outlet?

A:

Q: What is the equivalent resistance of a 200 Ohm and an 800 Ohm resistor connected in parallel?

A:

Q: How much does it cost to run a 1500-W hair dryer for 37 minutes each day for one month (30 days) at…

A:

Q: An electric circuit has a total of 68.8 Ohms of resistance, and is operated under a voltage of 78…

A:

Q: kilometer of wire having a diameter of 11.7 mm and a resistance of 0.031 ohm is drawn  down so that…

A: d1=11.7 mm d2=5 mm resistance, R= 0.031 Ohms Initial length= l1= 1km  We know volume will remain the…

Q: What current will be taken by a 850 W appliance if the supply voltage is 220 V ?

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

Q: The resistance (in Ω) of a light bulb rated 120 W, 240 V that draws an electric current of 1 A is

A: Given Power rated is P=120 W Voltage rated is V= 240 V Find the resistance of a light bulb.

Q: How much does it cost to run a 1500-W hair dryer for 18 minutes each day for one month (30 days) at…

A: The equation for the electrical energy consumed is given by

Q: a transformer has 40 turns in its primary coil and 600 turns in its secondary coil. if the primary…

A:

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

A:

Q: A transformer has 40 turns in its primary coil and 600 turns in its secondary coil. If the primary…

A:

Q: What is the Output Voltage of a battery that expends 7.2J of energy in moving 1C of charge?

A: Energy expended by the battery = 7.2 J charge = 1 C

Q: What is the equivalent resistance of a 250 Ohm resistor and 500 Ohm resistor connected in series?

A: Given: The first resistance is R1=250 Ω. The second resistance is R2=500 Ω. The expression for…

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: How many milliamperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance?

A:

Q: What is the power rating of a television set which draws a current of 2 A from a 220-volt outlet?

A:

Q: How many cells, each one having an open circuit emf of 4.5 V and an internal resistance of 0.5 ohms,…

A:

Q: If the unit cost of electricity in Luzon is PhP 8.9951 per kWh, what is the total cost (capital plus…

A: Given data: Cost of electricity = PhP 8.9951 per kWh Power (P) = 28 W Time (t) = 1000 h Capital cost…

Q: What is the current flowing in the coil when the applied voltage in a motor resistance of 3.4Ω is…

A:

Q: A transformer is to be used to step up voltage from an alternating current source from 120 V to 1800…

A:

Q: How much does it cost to run a 1500-W hair dryer for 41 minutes each day for one month (30 days) at…

A: The expression for the electric power in terms of energy and time is as follows: P=EtE=Pt…

Q: Energy is distributed to households from electrical substations as an ac signal…

A: Number of turns of secondary coil, Ns= 190 Input or source ac signal,…

Q: The current in the circuit is 5A and the voltage is 15V . Then find the value of the resistance in…

A: Given: The current in the circuit is 5 A. The potential difference is 15 V.

Q: What is the yearly cost of operating a 100-W television for 2 hours per day, assuming the cost of…

A: Given data: Power (P) = 100 W Daily uses = 2 hours per days Cost of electricity = Php 11.00 per kWh…

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

A:

Q: A television of 100 W is used for 2 h, then what is the value of unit of expense of electricity?

A:

Q: A transformer has exactly 600 turns on its primary and exactly 200 turns on its secondary. If a…

A: ....

Q: What is the inductance of a coil of wire that generates a voltage of 1 V when the rate of change in…

A:

Q: In the US, the conventional voltage seen in a receptacle( wall outlet) is 120 V. How many amperes is…

A:

Q: How much does it cost to run a 1500-W hair dryer for 18 minutes each day for one month (30 days) at…

A:

Q: The voltage V in volts of an electrical circuit is V = IR, where R is the resistance in ohms and I…

A: The product rule will be, ddtIR=IdRdt+RdIdt

Q: How much current does a 1500 Watt heater draw if supplied with a 120 Volt source?

A: Given Data: Power, P = 1500 W Voltage, V = 120 V   Solution: Current, I = P/V = 1500 / 120 = 12.5 A

Q: When current is 7.07 and resistance is 3.15, what is the voltage in the system?

A:

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.