Why are the conductors heating devices, such as bread-toasters and elec tric irons, made of an alloy rather than a pure metal ?
Q: 2) a) A 40-m length of copper wire at 20 deg c has a diameter of 0.3 mm. If a potential difference…
A: length of wire l =40 m diameter of wire d =0.3 mm = 0.3 x 10-3 m radius of wire r = d/2 = 0.15 x…
Q: WIRE #1 WIRE #2 0Z/////// Eradius Both wites are geare hically idenhial, have same d and r, same…
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Q: How many electrons does an element given as 24X50 has? What is the net electric charge of…
A: According to question--- Given data-- Element ‐--- 24X50 We have to find- Net charge on Element ?
Q: Two copper wires A and B have the same length and are connected across the same battery. If Rg= 4RA,…
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Q: Two copper wires A and B have the same length and are connected across the same battery. If RB =…
A: We know that,R=ρLA Equation 1here, A is the area of cross section.from equation 1A=ρLRfor…
Q: If a conducting metal were near 0 K, then what would be its resistance (R) to electric current?
A: At absolute zero temperature (0 K), the resistance of a pure, perfect metal would be zero, meaning…
Q: Aluminum has 62% of copper conductivity but is just 30% the weight of copper. Show that this means…
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Q: etermine the current flowing through an element at t=3 s, if the charge flow is given by:…
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Q: discuss how current flows in n type and p type semi-conductors
A: In n type material many conduction band electrons are present. The electrons will move towards the…
Q: 호 32 142 find the eguivalent resistance and totel current leaving the battery:
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- A block in the shape of a rectangular solid has a cross-sectional area of 4.00 cm^2 across its width, a front-to-rear length of 5.00 cm, and a material conductivity of 10^6 Ω x m^-1. The block’s material contains 5.00x10^22 conduction electrons/m^3. A potential difference of 35.0 V is maintained between its front and rear faces. Find: (a) the resistivity of the block material(b) the resistance of the block(c) the current through the block(d) the magnitude of the current density if it is uniform(e) the drift velocity of the conduction electrons (f) the magnitude of the electric field through the block#1: High voltage power lines are not covered with an insulating outer cover. A) What is the reasoning behind not putting on a protective insulating coating? B) Why are small birds not harmed when they land on these exposed high voltage wires?An iron rod has 3.48 x 10^19 free electrons of which 70% are directed to move due is for a period of 12s. The rest have a move randomly in the iron. (a) calculate the current produced. (b) in what direction is the current flowing? (Charge of electron, e= 1.6×10^-19)
- Determine the charge entering the element fro t = 0 to t = 2s if the current flowing through the element is given by :Their clothes tend to stick together after they pass through the dryer. Because? Do you expect that, on drying, assuming that all clothes are made of the same material (say, cotton), the agglutination will be higher or lower than in the case of clothes made with different materials? Because? (You may want to do the experiment the next time you do laundry.)In the figure below, charges totaling +2 C pass to the right through a cross-sectional area shown as gray while charges totaling -6℃ pass to the left through the same cross-sectional area in a time of 2s. The current passing through the area is 6C O 3 A O 4 A O 2 A O 1 A +2C
- Two concentric metal spherical shells, of radius a and b, respectively, are separated by weakly conducting material of conductivity ơ (see part (a) of figure). (a) (b) a. If they are m aintained at a potenti al difference V, what current flows from one to the other? b. What is the resistan ce between the shells? c. Notice that if b > a the outer radius bis irrelevant. How do you account for that? Exploit this observation to determine the current flowing between two metal spheres, each of radius a, immer sed deep in the sea and held quite far apart (see part (b) of figure), if the potential difference between them is V. (This arr angement can be used to measure the conductivity of sea water.)What is the difference between conductors and insulators from the atomic perspective?The electron drift speed is 2.5×10−4 m/s in a metal with a mean free time between collisions of 4.2×10−14 s. What is the electric field strength?