Figure 20.44 This REVAI, an electric car, gets recharged on a street in London. (credit: Frank Hebbert)

Q: A teapot with a surface area of 715 cm is to be plated with silver. It is attached to the negative…

A: Surface area (A) = 715 cm2Potential difference of the battery (V) = 12 volts Resistance (R) = 1.5…

Q: You light a 25-W light bulb with the current from a 12-V lead-acid storage battery. After 1.0 h of…

A:

Q: when operated at 120 V. How much charge enters (and leaves) the light bulb in 8.7 min?

A: See solution on next page

Q: A 6.00 V battery delivers a steady current of 1.25 A for aperiod of 1.50 hours. Calculate the total…

A:

Q: You have a 12.0V motorcycle battery that can move 5000 C of charge. How much energy does it deliver?

A:

Q: Question #18. Calculate the cost of operating this light bulb in 10 seconds. Given 4pesos/kWhr. I…

A: Given: The power of the bulb is 50 W. The time interval is 10 s. The cost rate is 4 pesos/kWhr.

Q: Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the…

A:

Q: A stationery shop use the following electric appliances: (i) Three Air Conditioner of rating 2100 W…

A: Electrical energy consumed is given by E = nPt Where n is number of appliance P is the power…

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: Given data: Power P =30 W Voltage V=120 V Time t =1.5 min =90 seconds

Q: A teapot with a surface area of 335 cm2 is to be plated with silver. It is attached to the negative…

A:

Q: A 2.5 kW heater element from a dryer has a length of 59 cm. If a 12 cm section is removed, what…

A: Given values:Power of heater element, P = 2.5 KwInitial length of dryer, Li = 59 cm = 0.59 mFinal…

Q: What is the current drawn by a 9.60 Ohm hair dryer, which uses 5.40 x 10$ Joules of energy, if it is…

A: Given: Resistance (R) = 9.6 ohms Energy used (E) = 5.40 x 105 J Time used (t) = 6 minutes = 360 sec…

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: Given: Power P=30 W            Operating Voltage V=120 V             Time t=2.8  min= 2.8 x 60…

Q: What current flows through a resistor if 1260 C of charge moves through it in 5.0 minutes?

A: Given data: Charge (q) = 1260 C Time (t) = 5.0 minutes Required: Current (I)

Q: An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, thepower consumed will be…

A: The electric power (P ) is calculated as, Where, P = power V = voltage across the resistance R =…

Q: A certain appliance draws 22 A across 25 V power source, how much will a spend if I use it for 8…

A:

Q: The body of a snorkeler swimming in salt water has a resistance of about 585 2. If the snorkeler is…

A: Given data:  Voltage (V) = 5.00×102 V Resistance (R) = 585 Ω Required: Current (I) and Power (P)

Q: A stationery shop use the following electric appliances: (i) Three Air Conditioner of rating 1600 W…

A: (i) n=3 air conditioners of rating P=1600 W running for t=10 h. (ii) n=2 water heaters of rating…

Q: Suppose you have a 12.0 V motorcycle battery that can move 5000 C of charge, and a 12.0 V car…

A: Given:

Q: A 50-watt lightbulb and a 100-watt lightbulb are each operated at 100 volts. Compared to the…

A: Given data:  Power of first lightbulb (P1) = 50 W P2 = 100 W Voltage (V) = 100 V Required:…

Q: A car owner forgets to turn off the headlights of his car while itis parked in his garage. If the…

A: Since there is two 2 headlights the total power is 72W

Q: A 12 V car battery dies not so much because its voltage drops but because chemical reactions…

A: D) Current passed through dead battery= 8 V / (0.5+0.05) = 14.5 A

Q: 6. chapter27-question20 A 4.0 kW heater element from a dryer has a length of 100 cm. If a 20 cm…

A: Given: Power P = 4.0 kW. Initial length L1 = 100 cm. Final length L2 = 80 cm. Voltage V = 120 V. To…

Q: A 750-kg electric car running solely on a 12.0-V battery attempts to scale a hilltop with a 200-m…

A: The potential difference, V; mass, m and gravitational strength, g are given as

Q: A 27 Ω component is connected to a 12 V battery. How much energy is expended per second?

A: Energy expended per second is the power itself. P=V2R

Q: 7. a. In a car electrical system, the capacity of a storage battery is rated in ampere- hours…

A: Given that Charge storage capacity of battery is Q = 100 A-hr = (100 A )X ( 3600 s) = 360000 C…

Q: A microwave oven draws 8 A when supplied with 120 V. The microwave is subsequently used for 6…

A: To find the electrical energy used by microwave

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A:

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: Here, we have to calculate the charge.

Q: The sticker on a compact disc (CD) player says that it draws 288 mA (milliampere) of current when…

A: Given: The voltage is 9 V. The current is 288 mA. Introduction: The power in the circuit is…

Q: What is the rate of the flashlight’s energy consumption, in watts, if it operates at a voltage of…

A: Rate of energy consumption is called Power. Power of flash light can be given as: P=VI Current…

Q: A cell phone contains a battery rated at 2600 mA # h = 2.60 A # h. How many electrons can this…

A: Introduction: Current=ChargeTime Ampere is unit of current mA = milli Ampere is smaller unit of…

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: Write a given values of this question. P=30WV=120Voltt=1min=1×60=60sec

Q: A 2.0 kW heater element from a dryer has a length of 80 cm. If a 10 cm section is removed, what…

A:

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: Here given the light operated at 30  W at 120 V. We have to calculate the amount of charges that…

Q: An 18.0 W device has 9.00 V across it. How much charge goes through the device in 4.00 h?

A:

Q: ric pow 3. A battery-powered global positioning system (GPS) receiver operating on 9.0 v draws a…

A: Given data as per question voltage  =   9v current =  0.13 time = 2h

Q: .A dead battery is charged by connecting it to the live battery of another car with jumper cables.…

A: Representation for the given circuit (and current flow across it) is as shown below.

Q: A holiday goose is cooked in the kitchen oven for 4.00 h. Assume that the stove draws a current of…

A: time, t = 4 h Current, i = 20 A  Voltage, V = 220 V  Cost $ 0.068 per kWh

Q: A stationery shop use the following electric appliances: (i) Three Air Conditioner of rating 2100 W…

A: (i) Number of air conditioners n=3, power consumed P=2100 W=2.1 kW and time t=10 hours.  (ii) Number…

Q: Two different 12-V automobile batteries on a store shelf are rated at 600 and 850 “cold cranking…

A: When a cell is connected across a circuit then the current starts flowing from one point to another…

Q: Assuming 94.0% efficiency for the conversion of electrical power by the motor, what current (in A)…

A: efficiency of motor= 0.94 mass of car= 755 Kg Voltage of battery= 12 V

Q: Assuming 95.0% effciency for the conversloh of electrla power by the motor, what current must the…

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.