A certain flashlight operates on a two 1.5v batteries connected in series. The lamp draws a current of 0.5A. (a) What electrical power is delivered to the lamp? (b) What is the resistance of the lamp filament?

Q: When connected to a 120 V source, an electric heater is rated at 1200 W and a toaster at 6.0×10 2 W.…

A: Calculate the total power P=Pheater+Ptoaster=1200 W+600 WP=1800 W

Q: If the battery in the circuit below is 9.77V, resistor R1=83.862, and resistor R2=59.65N, what is…

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Q: A battery has an emf of 12 V and an in- ternal resistance of 0.1 2. Its terminals are connected to a…

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Q: The potential difference across a resting neuron in the human body is about 62.0 mV and carries a…

A: Given Information:- Potential difference across a human neuron in the human body is  V=62…

Q: A battery of 9V is connected in series with resistors of 0.2Ω, 0.3Ω, 0.4Ω ,0.5Ω and 12 Ω,…

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Q: A lightbulb designed to operate in a 48.0 V circuit has a resistance of 237 Q. At what rate (in…

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Q: A 4.4(abbreviated with a Greek capital omega) flashlight bulb is connected to a 3.0-volt battery…

A: First we list the data given in the problem:

Q: When you connect a battery with emf 9.00 V to a resistor of resistance 12.0 Ω, energy is dissipated…

A:

Q: A 43 Ω component is connected to a 12 V battery. How much energy is expended per second?

A: Given Data: The resistance of a battery is, R=43 Ω The voltage of a battery is, V=12 V   The…

Q: Light bulb of an automobile dissipates 60 Watts when connected to a 12 Volt battery. How many hours…

A:

Q: A mobile phone charger draws O.2 A of current from the 120 V wall outlet. How much energy does it…

A: Energy = Power × Time # Power = IV where I is current and V is voltage P = (0.2)120 = 24 Watt =…

Q: An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 3.0 mm…

A: Given Adiameter of wire =  0.129 cm  length of wire 3.0 mm Current = 14.5 A Voltage = 120-V line…

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

A: P = V*I  30 = 120* I  I = 30/ 120  I = 0.25 A

Q: Each of three identical electric heaters is rated at 1000 W when operated across 100-V lines. When…

A: Given: Rating of electric heater (P)= 1000 W. Standard Supply voltage (V) = 100 V. Supply in circuit…

Q: An electric heater is constructed by applying a potential difference of 99.6V across a wire with a…

A:

Q: A certain battery has 6 cells connected in series, creating a total emf of 8.67 V. What is the emf…

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Q: An electric heater is constructed by applying a potential difference of 107.3V across a wire with a…

A: Potential difference (V) = 107.3 volts Resistance (R) = 5 ohm

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: What is the output voltage (in V) of a 3.0000 V lithium cell in a digital wristwatch that draws…

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Q: The leaf of a corn plant has a resistance of 2.0M Ohms, as measured between two electrodes placed…

A: Concept: OHM'S LAW is used to find current which flows within leaf. V=IR where V is potential…

Q: current of 0.080 A passing through a human body could be fatal. If you accidentally touched a 110 V…

A: Given V = 11O V I = 0.080 A

Q: A 150 W heating coil (like a light bulb) is designed to operate from 125 V. The coil is made from a…

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Q: An electric heater is constructed by applying a potential difference of 151V across a wire with a…

A: Power rating of heater is given by (P) = V2R Watt V = 151 Volt R = 5 ohm

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: The adjacent figure is the l-V curve of a solar cell operating at T=300K. The filling factor of the…

A: Imax = 60 mA Io = 40 mA Vmax = 0.6 V Vo = 0.4 V

Q: How long does it take 1.00 C of charge to flow through a handheld calculator if a 0.33 mA current is…

A: Electric current can be defined as, I=dQdt, where dQ is the amount of charge flowing through a given…

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

A: We know that Current  I =P/V I=30/120 I=0.25A

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 typical AAA battery can move 2000 C of charge at 1.5 V. How long will this run a 50 mW LED?  a.…

A: Voltage, V = 1.5 V  charge, q = 2000 C  Power, P = 50 mW

Q: The sticker on a compact disc player says that it draws 288 mA of current when powered by a 9 Volt…

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Q: A power transmission line is hung from metal towers with glass insulators having a resistance of…

A: Given that resistance is 1.00×109 Ω, and voltage is 200 kV.

Q: The power rating of the heater a Nichrome wire that has a total resistance of (8 N) and carried a…

A: Solution: Calculate the potential difference across the Nichrome wire. V=IR Here, V is the voltage,…

Q: Four 1.5 V cells are connected in series to a 12 ohm light-bulb. If the resulting current is 0.45 A,…

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Q: The resistance of a 60.-watt lightbulb operated at 120 volts is approximately (1) 720 Q (2) 240 Q…

A: Power P=VI  Also V=IR  R=V/I

Q: A power plant is being built that will deliver 400 kw at 79,000 V using a tungsten cable with a…

A: GivenPower deliver by powe plant ,Pout=400 kWat voltage , V=79000 VResistance of tungsten cable ,…

Q: An electric heater is constructed by applying a potential difference of 142.4V across a wire with a…

A: Given that the potential difference across a wire with a resistance.Then We have to determine the…

Q: When the cells are connected in parallel, then (A The emf increases B The emf decreases C The…

A: If all physical parameters and temperature stay constant, Ohm's law asserts that the voltage across…

Q: What is the resistance of a 10.0-meter-long copper wire having a cross-sectional area of 1.50 x 10 6…

A: Given data:  A copper wire  Length (L) = 10.0 m Cross sectional area (A) = 1.50×10-6 m2  Temperature…

Q: A 100 W light bulb designed to operate at 120 V has a filament with a resistance of 144 Ω.  What…

A: The metal or conductor which have high melting only those materials used as a bulb filament because…

Q: An electric heater is constructed by applying a potential difference of 95.1V across a wire with a…

A: Given Data : The voltage applied across the heater is given as V = 95.1V. The resistance of the wire…

Q: You have a battery marked "6.00 V." When you draw a current of 0.399 A from it, the potential…

A: Emf of battery ε == 6.00 V Current drawn from the battery I = 0.399 A potential difference for this…

Q: A power transmission line is hung from metal towers with glass insulators having a resistance of…

A: Given data: Resistance of glass insulator, R=1.00×109 Ω Voltage, V=200 kV =200,000 V

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

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.