Some superconductors are capable of carrying a very large quantity of current. If the measured current is 3.00 × 106 A, how many electrons are moving through the superconductor per second? (e = 1.60 × 10−19 C)
Some superconductors are capable of carrying a very large quantity of current. If the measured current...
2) A very large number of very long wires are arranged to form a current-carrying “ribbon," as shown in the figure below. Each wire can be assumed to have negligible radius and carries the same current I (in the same direction). The ribbon is oriented in the xy-plane, at z =0. Hint: This problem has planar symmetry, so consider how you might apply Ampere's Law. Also note that this problem is equivalent to an infinite current-carrying sheet with surface a...
An electric device delivers a current of 3 A to a device. How many electrons flow through this device in 8 s? (e = 1.60 × 10-19 C)
How many electrons per second flow through a wire with a 27-pA current? (Recall that 1 pA = 10−12A and e=1.60×10−19C) Express your answer using two significant figures.
A typical household circuit is capable of carrying 30.0 Amps of current at 120 V before the circuit breaker will trip. How many 1500-W hair dryers can run off one such circuit? Tries 0/10 In the rush to get ready for lecture, a physics professor leaves the hair dryer described in the previous problem running and does not turn it off until he gets home 7.9 hours later. How much will this add, in dollars, to his next electric bill...
2. A very small object carrying -6.0 C of charge is attached to a large, well-anchored and positively charged object. How much kinetic energy does the negatively charged object gain if the potential difference through which it moves is 3.0 mV? A c. D 18 nJ 0.50 kj 0.5 6.0 MJ 2. A very small object carrying -6.0 C of charge is attached to a large, well-anchored and positively charged object. How much kinetic energy does the negatively charged object...
You now wish to more fully characterize the engineered cells themselves. You wish to examine individual magnesium ion (Mg2+) channels on the surface of the cell membrane. Assume for now that only magnesium ion channels exist on these engineered cells, and only these channels account for ionic current flowing through the cell membrane. Multiple choice question: Assume the current measured through a single magnesium ion channel is 1 pA (10-12 A). How many magnesium ions per second does this represent?...
In comparing wires of identical shape and carrying the same current but made of different metals, is the drift velocity in each wire inversely proportional to the number density of charge carriers? No. The drift velocity is the same for all conductors. Yes. To have the same current from k times as many carriers, it takes k times the drift speed. No. The drift velocity is directly proportional to the number density of carriers. Yes. To have the same current...
A very long ("infinity") wire, straight and horizontal, conducts a current in the negative "x-axis" direction such that 3.5*10+18 electrons per second pass through its cross-section. a) What are the magnitude and direction of the magnetic field produced by this wire at a point 4.00 cm above it? b) What acceleration will a particle experience, at that same point, which has a charge of 7 μC, a measured mass that is 50 times that of an electron and that moves...
Suppose a van de Graaff generator has a hollow sphere on top with a raius of 10 cm. (0.1m) and it carries a charge of -1.60 uC or -1.60 x 10^-6 C. A.)How many extra electrons is the ball carrying? B.) What is the value and the direction of the electric field, E, on the surface of the sphere? C.) What is the electric field, E, anywhere inside the sphere? Thank you very much for your answer.
electron guns are used in x-ray tubes. the electrons are accelerated through a relatively large voltage and directed onto a metal target, producing x-rays. (a) how many electrons per second strike the target if the current is 0.750 mA? (B) what change strikes the target in 0.950s?