If the current in a wire is halved, how will this affect the mean time between collisions? The mean time between collisions will remain unchanged. The mean time between collisions will be halved. The mean time between collisions will be doubled.
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If the current in a wire is halved, how will this affect the mean time between collisions?
The mean time between collisions will remain unchanged.
The mean time between collisions will be halved.
The mean time between collisions will be doubled.
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- If the current carried by a conductor is doubled, what happens to (a) the charge carrier density, (b) the current density, (c) the electron drift velocity, and (d) the average time interval between collisions?Consider a circuit consisting of a battery (4.26 Volts) and three resistors in parallel. If the resistances of the resistors are 16.3 Ohms, 17.7 Ohms, and 33.3 Ohms, calculate the current drawn from the battery. Give you answer in milliamperes to at least 3 significant figures.An electron moving in a wire collide again and again with atoms and travel an average distance between the collision that is called mean free path. If the mean free path is less in some metals, what can you say about the resistance of the these metals? For a given conductor , what can you do to lengthen the mean free path?
- A copper wire 85 m long must experience a voltage drop of less than 1.2 V when a current of 1.7 A passes through it. Using the data in Table 1, calculate the minimum diameter (in mm to 2 decimal places) of the wire that can be used. Table 1: Room-Temperature Electrical Conductivities for Nine Common Metals and Alloys Metal Silver Copper Gold Aluminium Brass (70Cu-30Zn) Iron Platinum Plain carbon steel Stainless steel Electrical Conductivity [(02. m)-1 6.8 x 107 6.0 x 107 4.3 x 107 3.8 x 107 1.6 x 107 1.0 x 107 0.94 x 107 0.6 x 107 0.2 x 107a current 2A flows in a copper wire over a length of 3 km and 1,1 mm.known copper conductivity is 5.8×10^7 A/V defined the voltage drop in the missing wires and electrical chargeSeveral resistors in a circuit have a theoretical combined resistance of 107 ohms. When the resistance is found through measurements of voltage and current in the circuit, the value is 99 ohms. What is the percent error? 0.075% O 8.08% O 0.081% 7.18 %
- An electric device draws 7.10 A at 240 V. If the voltage drops by 10 % , what will be the current, assuming nothing else changes? Next, if the resistance of the device were reduced by 10 %, what current would be drawn at 240 V? Express your answer to two significant figures and include the appropriate units.Ohm's law states that the electric current flowing through a conducting wire, I is directly proportional to the potential difference across its ends, V, provided its temperature stays unchanged. Draw a labelled circuit diagram to verify this law. Explain the function of each component on the circuit.In the last column in the data table, it says that it's about voltage(v) divided by current(A) is equal to ohms so V/A = ohms. So if it's V/A and if you divide them to get the slope it's (y2-y1)/(x2-x1) then shouldn't V be the y value and A be the x value? And can you also try to use a line of best bit instead of drawing the line through each dot?
- Current has a heating effect due to the law of conservation of energy. A sealed container containing ice is connected across a supply having a voltage V. If the current / is flowing through the connection, which of the following equations can solve the time needed to change the ice to water? Let m be the mass of the ice and Lfbe the latent heat of fusion of the ice. Ot = VImLf VI t = mLf t = VI O The answer cannot be found on the other choices.a resistor of 3 ohms and an unknown resistor are connected in parallel. the total resistance of the whole circuit is measured to be 2 ohms. what is the resistance of the unknown resistor (in ohm)?The amount of charge flowing through a particular conducting wire is represented by the equation q (t) = at³ + bt? +c, where a = 5 A/s?, b = 3 A/s, and c is an unknown constant. When t = 0.9s, the voltage across the wire is measured to be 12 V. What is the resistance of the wire in Ohms?