Practice: A lightning bolt hits the ground carrying a current of 3 x 10 ^{4} A. If the strike lasts 50 ms, how much charge enters the ground?

Subjects

Sections | |||
---|---|---|---|

Intro to Current | 7 mins | 0 completed | Learn |

Resistors and Ohm's Law | 14 mins | 0 completed | Learn |

Power in Circuits | 11 mins | 0 completed | Learn |

Microscopic View of Current | 8 mins | 0 completed | Learn |

Combining Resistors in Series & Parallel | 37 mins | 0 completed | Learn |

Kirchhoff's Junction Rule | 4 mins | 0 completed | Learn |

Solving Resistor Circuits | 32 mins | 0 completed | Learn |

Kirchhoff's Loop Rule | 86 mins | 0 completed | Learn |

Additional Practice |
---|

!! Resistor-Capacitor Circuits |

Practice: A lightning bolt hits the ground carrying a current of 3 x 10 ^{4} A. If the strike lasts 50 ms, how much charge enters the ground?

0 of 2 completed

Concept #1: Intro to Current

Practice #1: Amount of Charge in Lightning Strike

An electric device delivers a current of 3.0 A for 10 seconds. How many electrons flow through this device?
A) 2.0
B) 19 x 1020
C) 20
D) 1.9 x 1020

Which one of the following is the correct unit for electric current?A) V/sB) C/sC) J/sD) A/s

A metal tube is filled with a gas of ions (a plasma). Inside the gas, 5 coulombs of positive charges is moving to the right each second and 3 coulombs of negative charges is moving to the right each second. What is the total current that is flowing through the tube?Select one:a. 2 Amps flows to the leftb. 8 Amps flows to the leftc. 2 Amps flows to the rightd. 3 Amps flows to the lefte. 8 Amps flows to the right

The graph in the figure shows the current through a 1.0ohm resistor as a function of time.How much charge flowed through the resistor during the 10 s interval shown? What was the total energy dissipated by the resistor during this time?

Conceptual: A) Consider a lightbulb attached to a battery with wires. How must the light bulb be connected in order for it to light? B) Identify the relevant parts of the bulb and battery and explain, using the concept of potential difference, why and how your configuration causes the bulb to light. Do not use the phrase "complete circuit".

A 14.0 gauge copper wire of diameter 1.628 mm carries a current of 12.5 mA.Part A What is the potential difference across a 2.00 m length of the wire (for copper ρ = 1.72 × 10-8 Ω • m)? Part BWhat would the potential difference in part (a) be if the wire were silver instead of copper, but all else was the same (for silver ρ = 1.59 ×10-8 Ω • m)?

Which of the following statements are true? (More than one answer may be correct - select all that are true).Select one or more:a. In a circuit, current is delivered by the positive terminal of a battery, and it is used up by the time it returns to the negative terminal of the battery.b. In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges.c. When an electric field is applied to a conductor, the free electrons move only in the direction opposite the applied electric field.d. By convention, the direction of a current is taken to be the direction of flow for negative charges.e. Current is the total amount of charge that passes through a conductor's full cross section at any point per unit of time.

The Stanford Linear Accelerator Center (SLAC) operated an electron storage ring about 72.0 m in diameter called SPEAR (closed in 2009), in which a circulating beam of electrons moved at nearly the speed of light. Assuming that this electron beam had a current of 17 A, how many electrons were in the beam at any given moment?

In this problem denotes the emf provided by the source, and is the resistance of each bulb.Bulbs A, B, and C in the figure are identical and the switch is an ideal conductor. How does closing the switch in the figure affect the potential difference?Check all that apply.a) The potential difference across A is unchanged.b) The potential difference across B drops to zero.c) The potential difference across A increases by 50%.d) The potential difference across B drops by 50%.

Can a wire carry a current and still be neutral--that is, have a total charge of zero? Explain.

The magnitudes of the current density and the diameters for wires 1 and 2 are given in the table. The current directions are indicated by the arrows.WireCurrent density(A/mm2)Diameter(mm)14.02.125.73.0A) Find the Current I3 in wire 3. Express your answer in amperes to two significant figures. Call current out of the junction positive and current into the junction negative.B) Find the magnitude of the current density J3 in wire 3. The diameter of wire 3 is 1.5mm. Express your answer in amperes per square millimeter to two significant figures.

A certain ammeter has a resistance of 5.5 × 10-5 Ω on a scale which reads up to 2.9 A, and contains a 7.5-Ω galvanometer.What is the sensitivity of the galvanometer, in microamperes?

Which of the following would double the amount of current flowing through a piece of metal wire? A) Halve the voltage across it. B) Double the voltage across it. C) Quarter the voltage across it. D) Quadruple the voltage across it.

In a typical lightning strike, 2.5C flows from cloud to ground in 0.20 ms. What is the current during the strike?

Every minute, 120 C of charge flow through this cross section of the wire. The wire's current is:A) 120AB) 240AC) 2AD) Some Other valueE) 60A

Where in the circuit of (Figure 1) is the current the largest? The current is the same at all points?

All other things being equal, current will be larger in a wire that has a larger value ofa) conductivity.b) resistivity. c) The coefficient of current. d) net charge.e) potential.

Why are metals good conductors of electric current? Choose one of the followingDo they possess high concentrations of protonsDo they possess low concentrations of protonsDo they possess high concentrations of free electronsDo they possess low concentrations of free electrons

Enter your friends' email addresses to invite them:

We invited your friends!

Join **thousands** of students and gain free access to **55 hours** of Physics videos that follow the topics **your textbook** covers.