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Ohm's law
Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
Path of Least Resistance
In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
What is the limiting electrode in 18650 battery cell, And explain why?
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- The first Leyden jar was probably discovered by a German clerk named E. Georg von Kleist. Because von Kleist was not a scientist and did not keep good records, the credit for the discovery of the Leyden jar usually goes to physicist Pieter Musschenbroek from Leyden, Holland. Musschenbroek accidentally discovered the Leyden jar when he tried to charge a jar of water and shocked himself by touching the wire on the inside of the jar while holding the jar on the outside. He said that the shock was no ordinary shock and his body shook violently as though he had been hit by lightning. The energy from the jar that passed through his body was probably around 1 J, and his jar probably had a capacitance of about 1 nF. a. Estimate the charge that passed through Musschenbroeks body. b. What was the potential difference between the inside and outside of the Leyden jar before Musschenbroek discharged it?Conduc-Thor-s. Thor has two square prism conductors that are made of the same ohmic material and with properties indicated below. Conductor Length | Cross-Section Side Length Alpha L Beta L/2 s/4 Suppose both conductors are subject to the same potential difference AV across their length while keeping their temperatures fixed. Which of the following is the correct relation between the electric currents, Ia and IB, through Alpha and Beta? O A. Ia = 8IB O B. 8Ia = Ig O. Ia = 4I8 O D. 4Ig = Ig Clear my choiceIf you examine your smartphone battery, you will likely see two numbers: the battery's "capacity" labeled in mAh (milliamps x hours or milliamp-hours), and the battery's voltage or potential difference in V (volts). 1. What physical quantity is the battery's "capacity" measuring? Explain how you can tell. This answer has not been graded yet. 2. Suppose your phone's battery has a capacity of 2500 mAh and a potential difference of 3.7 V. What is the amount of charge, in C (coulombs), that is stored in your smartphone battery when it's fully charged? Charge = 3. Smartphone chargers are usually labeled with their current output in A (amps). Suppose your charger delivers a current of 1.1 A. If your phone's battery is completely drained, how long will it take to fully charge the battery using your charger? Charging time = hours 4. Smartphones are advertised with a certain amount of "talk time", i.e., how long the phone's battery will last if you are making a call. If your phone is advertised…
- Point A is a distance of 0.085 m from a point charge of 0.045 μC. Point B is a distance of 0.225 m from this charge. What is the voltage difference VA-VB? Answer in volts.200 pF in series w/ unknown & as a series combination in parallel w/ 100 pF. The potential between a and b =26 V and the 200 pF capacitor stores 40nJ. 1. Find unknown capacitance and Cequivalent of the circuit.2. what is the dielectric constant K to make an equivalent capacitor w/ two 1x1cm square aluminum electrodes 0.4 mm apart and filled w/ the dielectric?A parallel plate capacitor has a charge on one plate of q = 4.5E-07 C. Each square plate is d1 = 2.6 cm wide and the plates of the capacitor are separated by d2 = 0.25 mm. The gap is filled with air, εo = 8.85 × 10-12 C2/Nm2. What is the voltage between the plates, ΔV, in V? What plate width would double this voltage, in centimeters?
- Draw the 1/d versus Q graph. d(mm) V(V) Q(C) 1.23 10 0.77 15 0.6 20 0.5 25 0.42 v Cmeasuring amp.=0.22 x 10-6 F 2.5 kV A Uc E0 Q = CU. = / Vsupply V Dielectric material V Metal plates radius = air = 130 mmThor has two square prism conductors that are made of the same ohmic material and with properties indicated below. Conductor | Length | Cross-Section Side Length Alpha L Beta L/2 8/4 Suppose both conductors are subject to the same potential difference AV across their length while keeping their temperatures fixed. Which of the following is the correct relation between the electric currents, Ia and IB, through Alpha and Beta? A. Ia = 81g B. 8Ia = I8 C. Ia = 4Ig D. 4Ia = I8A battery will be used to power the room for 8 hours a day. A battery cell is rated at 6V, 2AH with with a maximum depth of discharge of 80%. How many battery cell will you need for 2 days of autonomy? Select one: a. 6 O b. 5 O c. 10 O d. 8
- Energiser a. An electric fence, the fence-wire is set to 60 V while the ground is always 0.0 V. If we can think of the bird and the cow as resistors in the circuit. Use what you know from this week and/or last week's lab to explain the response each animal will have. Explain your reasoning. Earth Post b. If you are caught outside in a lightning-storm, it is important to avoid hiding under trees. Many cattle deaths during lightning storms occur when the animals are too close to the tree. It has been frequently seen that a cow standing with its body aligned radially to the tree is less likely to survive than cows that have their body tangentially oriented to concentric circles around the tree. Use what you know from this week and/or last week's lab to explain why cow A is safer than cow B or C. В 2524.a. When a standby battery is in storage, at which of the following intervals should the specific gravity ofthe electrolyte be checked?A. 6 monthsB. 1 monthC. 9 monthsD. 3 months24.b. The working voltage of a battery is defined as the voltage at the battery terminalsA. while float charging.B. while the battery is being tested.C. while the battery is being discharged.D. while the battery is being charged.A common laboratory device for building up high voltages is the Van de Graaff generator. Which of following statements about Van de Graaff generators is not correct? OA. The voltage of a Van de Graaff generator.can only be increased by increasing the radius of the sphere. O B. The voltage of a Van de Graaff generator can be increased by increasing the radius of the sphere or by placing the entire system in a container filled with high-pressure gas. OC. In a Van de Graaff generator, a moving rubber belt carries electrons from the voltage source to a conducting sphere. O D. All the above statements are correct. E. None of the above statements is correct.