A 300-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,240 A. If the conductor is copper with a free charge density of 8.5  1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable? (Use 3.156  107 for the number of seconds in a year.) ?yr

Q: Ex. 1: A cuurent of 800 mA is passed through an electric lamp for a minute. Find the number of…

A: We have to find- number of electrons (n)=? The data given as- Current through lamp=800 mA=0.8 A…

Q: 500mA of a current is flowing through a filament of a lightbulb. How many coulombs of charge move…

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Q: A piece of wire of length 48.9 cm made from a material of resistivity 1.6 ohm-metre was used to…

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Q: There is a net passage of 5.2  1018 electrons by a point in a wire conductor in 0.24 s. What is the…

A: Given: Number of electrons time of flow Charge on an electron Required: Current in the wire (I).

Q: How many watts does a flashlight that has 6.00×102 C pass through it in 0.500 h use if its voltage…

A: Power is product of current and potential . P=IV       .....1 where I is current            V is…

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Q: 1.47The energy absorbed by the BOX in Fig. P1.17 is given below. Calculate and sketch the current…

A: Step 1: Step 2: Step 3: Step 4:

Q: The current in a lightning bolt is 4.9 x 10° A. How much charge passes through a cross- sectional…

A: Given,  Current flowing through lightning bolt is, i=4.9×105A   And Current can be defined in terms…

Q: A copper transmission cable 43 km long and 5.3 cm in diameter carries a current of 41 A. How much…

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Q: 6. a) A 240 V lamp draws a current of 0.50 A from the mains supply. What is the resistance of the…

A: a. Given data The voltage is given as V = 240 V. The current is given as I = 0.5 A. The resistance…

Q: An electric current is given by I(t) = 100sin(20rt), where I is in amperes and t is in seconds. What…

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Q: Q3.a.Calculate the current density for Aluminum wire has radius 1mm and current 1mA? 318.31A/m? b.…

A: Current density of the conductor                                 [2]   A wire of cross-sectional…

Q: please answer the following A) A lightning stroke lasts 0.02s and involves a flow of 298 C. What is…

A: (A) Assume the current is denoted by I. The time taken is t = 0.02 s. The charge flow is Q = 298 C.

Q: R1 V1+ R2 ce V2+ R3 If RI = 202, R2 = 120, R3 = 42, V1 = 9V, and V2 = 3V, find the current through…

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Q: An electric current in a conductor varies with time according to the expression I(t) = 90 sin…

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Q: An electric heater carries a current of 13.0 A when operating at a voltage of 1.50 x 102 V. What is…

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Q: A 230-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1,060…

A: Given Transmission line length, L=230km=230000m Current, I=1060A Diameter , d=2cm Radius,…

Q: The current in a wire is 0.490 A. How much charge flows through a cross section of the wire in 11.7…

A: Current is defined as the rate of flow of charge through a cross-section.

Q: 4. Plot a curve to show the variation of voltage with the current. CURRENT (mA) Solve the slope and…

A: Ohm's law states that the current through a conductor between two points is directly proportional to…

Q: A 60 W bulb carries an electrical current of 0.5 A. The total charge that passes through the bulb in…

A: Given that,Power : P = 60 (W)Current : I = 0.5 (A)Here we need to find the total charge through the…

Q: 3.1.5 Use nodal analysis to find Vo in the circuit in Fig. P3.1.5. 6 ΚΩ 3 ΚΩ ww 20 V | + + 12 ΚΩ ΣΤ…

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Q: 3) A 100 meters long wire with diameter 2 millimeter is attached to a 6 Volts battery. You measured…

A: Given , Length of the wire, L = 100 m              Diameter of wire, d =  2 mm = 2 × 10-3 m…

Q: Typical household currents are on the order of a few amperes.  If a 1.53 A current flows through…

A: The amount of current flowing through the leads of an electrical appliance is I= 1.53A. The amount…

Q: The magnitude J of the current density in a certain wire with a circular cross section of radius R =…

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Q: A light bulb has resistance of R= 150 Q and has a current of /= 1.1 A passing through it Express the…

A: Power in terms of I and R. Numerical value of Power(P) in W. Given, ResistanceR=150 ΩCurrentI=1.1 A…

Q: The amount of charge that passes through the filament of a certain lightbulb in 1.77 minutes is 8.22…

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Q: An electric current in a conductor varies with time according to the expression I(t) =…

A: Electric current is generated due to the flow of charges. It is the rate of change of charge with…

Q: A cylindrical conducting wire which is 65.42cm long, 64.26mm thick and resistivity of 5.85Ω.m, If…

A: Given Data, Length of wire L =65.42 cmthickness t = 64.26 mmresistivity ρ=5.85 Ωmcurrent I =12.9…

Q: 1.15 When a car has a dead battery, it can often be started by connecting the battery from another…

A: Given: v=12vI=40At=1.5min=90s

Q: How many watts does a flashlight that has 6.00×102 C pass through it in 0.500 h use if its voltage…

A:

Q: 2. A tungsten filament has a resistance of 133 Q at 150°C. If the temperature coefficient of…

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Q: Find the radius of the unmyelinated axon (m) with space parameter A = 14 mm, (Resistance of a unit…

A: Solution: as given that space parameter λ = 14 mm= 0.014 mRm =0.2 ohm m2resistivity of axoplasma…

Q: *13. Determine V, and ID for the network of Fig. 2.142. +10 Vo 2 k2 2 k 2 k

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Q: A metallic wire with resistance 8Q, cross-sectional area 8.2x10 m, and conductivity a- 5.81x10 o'mis…

A: Write the expression for the current.

Q: a. What voltage is involved in a 1.44-kW short circuit through a 0.100- resistance?

A: Given that-Dissipated power, P=1.44 kW=1.44×103 WattResistance, R= 0.100 ΩDissipated power, P=V2R…

Q: During 33 seconds of use, 340 C of charge flow through a microwave oven. Compute the size of…

A: Current is defined as rate of flow of charge,                                       I = Q/t

Q: During  48 seconds  of use,  270 C  of charge flow through a microwave oven. Compute the size of…

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Q: The drift speed of charge carriers in a conductor carrying current / is ngA where n is the number of…

A: given: Drift speed of charge carriers  in a current carrying conductor       Vd = InqA  where n -…

Q: During 49 seconds of use, 270 C of charge flow through a microwave oven. Compute the size of the…

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Q: 2. A 2 meter rod of 60mm of diameter is drawn (pulled/stretched) until its resistance is 25 times…

A: Part a) Q.2. Given: The initial length of the rod is lo=2 m. The diameter of the rod is d=60 mm. Let…

Q: A certain geophysical technique determines the electrical resistivity of the ground by measuring the…

A: Uncertainties in measurement arise due to mainly three reasons, Instrument, Human and Environment…

Q: 2. A 1.5-m wire measuring 1.5 m³ has a resistance of 0.955-µN at 20 °C. Calculate the resistance of…

A: Given Length L1=1.5m Volume V1=1.5m3 Area A1=V1/L1=1m2 Resistance R1=0.955μΩ Area A2=450cm2 Length…

Q: 12. The resistance R of a conductor of length L and area of cross - section A carrying a current I…

A: Option d is correct.

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.