A 5000 Watt motor does 15,000 Joules of work while drawing 5.0 amps of current.  What is the internal resistance of the motor?

Q: The 120 V electric heater in a coffee maker has a resistance of 15 Ω. How long will it take for this…

A: Given: The voltage of electric heater is V=120 V. The resistance of electric heater is R=15 Ω. The…

Q: How much electrical energy (in kilowatt hours) would a 45.0 W light bulb use in 60.0 days if left on…

A: Given that                     The power of the bulb is (P) = 45W                      Time = 60days…

Q: What is the power of a 1.00×102MV lightning bolt having a current of 2.00×104A?

A:

Q: Which of the following energy transformations occurs when electric current passes through a…

A: Introduction: The current flow in the circuit is due to electrical energy, resistance is a passive…

Q: 10-Ω resistive coil in a coffee maker generates heat energy at a rate of 1.0 kwatts. What is the…

A: Given that:- Resistance of the coil of coffee maker=10ohm

Q: When plugged into a 120-Volt outlet, a light bulb consumes 300 joules of energy over a 5 second time…

A: Given: Voltage, V = 120 V  Energy, E = 300 J  time, t = 5 s

Q: What is the power dissipated in the 202 resistor when = 20 V? 40 N 30 Ω 30 2 30 2 Lum 20 N

A: The electrical power is given by  P  = I2 R where, I is the current and R is the resistance.  The…

Q: of 5.0 0. What is the power rating of the heater? Select one: A. 2.07 B. 2.46 C. 1.88 D. 1.72 OE.…

A: An electric heater which has following specifications- V=101.7 V R=5.0 ohm P=?

Q: A current of 0.3 A goes through an electric motor for 7 min. How many coulombs of charge…

A: Write the expression for the charge. Here, I represents the current and t represents the time.

Q: A coil of Nichrome wire is 25.0 m long. The wire has a diameter of 0.400 mm and is at 20.0°C. If it…

A: Length of wire (L) = 25 m diameter of wire (d) = 0.4 mm radius of wire (r) = 0.2 mm Current (I) =…

Q: The current in the heater is 10.0 A when the unit is operating. Resistance of the heating coil is…

A:

Q: What is the effective resistance (in Ω) of a car's starter motor when 146 A flows through it as the…

A: The effective resistance of car's starter motor is 0.076 ohm.

Q: The motor in a toy car operates on 6.00 V, developing a 4.50 V back emf at normal speed. If it draws…

A: Given  V = 6.00V  Vback = 4.50 V I = 3.20 A R =???  I1 =???..(at start  Vback =0 V)

Q: The power rating of an electric motor that draws a current of 3.0 A when operated at 120 V is О . 40…

A: Given data I=3 AV=120 V

Q: A moving coil ammeter gives a full scale deflection for a current i = 60 mA and its coil has a…

A: Current for full scale deflection of a moving coil ammeter (i) = 60mA Resistance of coil (Rc) = 0.5…

Q: A coil of wire is placed in a cup of water and, when it is plugged into the wall, it draws 5 A of…

A:

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: (mC) 60 15 0 1 2 4 5 mA O 10 mA 15 mA 20 mA O 25 mA 3.

A:

Q: Consider the arrangement shown in the figure below where R = 5.50 N, l = 1.10 m, and B = 2.25 T. B R…

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Q: The wiring in a direct current motor has a resistance of 4.6 N and it produces a back e.m.f of 2.2 V…

A: Resistance of motor = 4.6 ohm back emf = 2.2 volts voltage provided by battery = 16.6 volts

Q: A current of 0.5 A flows through a fluorescent lamp of resistance 300 Q. The power dissipated on the…

A: The power dissipated is given by P=I2R Here, I is the current and R is the resistance.

Q: How many KWh of energy does a 650-W toaster use in the morning if it is in operation for a total of…

A: Given:Power = 650 W.Operational time = 4.5 min.

Q: Consider the circuit shown in the figure. S 7.20 (a) What is the current, in amperes, on the 7.2N…

A: since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: The motor in a toy car is powered by four batteries in series, which produce a total emf of 6.00 V.…

A:

Q: What is the power in watts of a 2.40 ✕ 102 MV lightning bolt having a current of 1.87 ✕ 104 A?

A: Given,Vo=2.4*102MV or 2.4×108VoltsIo=1.87×104A

Q: A 0.364 kg toy car is powered by four AA batteries (6.00 V total) connected directly to a small DC…

A: kinetic energy of car =12mv2=12×0.364×2.352=1.005095 Joules If E is the energy suplied by the…

Q: A  15Volts battery produces 4 Ampere of current in the circuit. The electrical power is measured to…

A:

Q: 32 The following information is given on the brushes used in the motor of Problem 31: number of…

A: Given no of brushes =2 current per brush =15A  Resistivity of brush =0.0016ohm  Brush pressure…

Q: A current of  0.9 A  goes through an electric motor for  4 min.  How many coulombs of charge flow…

A: Current passes through motor i=0.9 A Time t=4 min t=4 x 60sec t=240 sec

Q: The copper windings of a motor have a resistance of 50 ohm at 20°C when the motor is idle. After the…

A:

Q: The generator of a car idling at 1.638E+3 rpm produces 11.6 V. What will the output be at a rotation…

A:

Q: How much chemical energy must a 1.25V flashlight battery expend in producing a current flow of 150…

A:

Q: la. A lawn tool is powered by a 56 volt, 2.5 Ah (amp-hour) battery. When fully charged what is the…

A: 1.a The formula for the energy stored in a battery is:

Q: The motor in a toy car operates on 6.00 V, developing a 4.70 V back emf at normal speed. If it draws…

A: Given that:- Source voltage=Vs=6 V  Back emf=Vb=4.7V

Q: An electric train operates on 795 V. What is its power consumption when the current flowing through…

A:

Q: How much energy (in units of kWh) does a 824-W electric motor use in 29 hours of operation? O a.…

A: Given : Power of motor, P = 824 W Time, t = 29 hrs.

Q: What is the cost of operating a 2.8 W electric clock for a year in Phoenix? (The cost of electricity…

A: Given: Power of electric clock is P = 2.8 W The cost of electricity is 10.2 cents/kWh

Q: How much power is dissipated in the 5Ω resistance? a) 7.62 w b) 11.02 w                       c)…

A: Giv3n : A circuit diagram with supply voltage 12 V.

Q: A  man owns a canister vacuum cleaner rated at 353 W, 120V. (i). What is the electrical resistance…

A:

Q: A pulse of electricity measures 305 V, 0.15 A and lasts 500 μs. What power and energy does this…

A:

Q: A current of 0.3 A is passed through a lamp for 2 minutes using a 6-V power supply. The energy…

A: Given : I = 0.3 A t = 2 minutes = 2 x 60 = 120 seconds V = 6 V

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

A: efficiency of motor = 95 % Battery's potential difference = 12 Volts mass of electric car = 828 kg…

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.