When the resistance of the variable resistor in the lefthand coil is increased at a constant rate, what is the direction of the current in resistor R of the right-hand coil, from a to b or from b to a? Briefly explain.
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When the resistance of the variable resistor in the lefthand coil is increased at a constant rate, what is the direction of the current in resistor R of the right-hand coil, from a to b or from b to a? Briefly explain.
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- The magnetic flux through a loop of wire is zero. Can there be an induced current in the loop at this instant? Explain.What is the emf in the entire coil at t=2.4 s? For the purposes of entering a sign, let the positive direction for the emf in the loop be in the clockwise direction. What is the power dissipated in the entire coil at t=2.4 s? What is the total energy dissipated in the entire coil from t=0 to t=2.4 s?. The following picture shows a LONG conductor carrying current 1. Nearby there is a conducting rectangular loop with sides a = 8 cm and b = 4 cm. The loop also carries a resistance R = 10 ohms. The curent is constant and has a value of I = 6.0 Amperes. The loop is moving away to the right with a constant velocity, V = 2 m/s. Answer the following questions at the instant of time t" when the left edge of the loop is at position "x" as shown below Use the coordinate system , x to the right, y into the board, z upward a) Write an expression for the magnetic field as a function of the distance "x" (from the LONG conductor to the loop. ) USE “+" for CCW circulation and “.“ for CW circulation. b) Write the magnetic field in "i-j-k" format at point "x" to the right of the current carrying wire in the "i-zZ" plane R a c) Write the infinitesimal area vector for the loop in "i-j-k" format d) Write the explicit integral for the magnetic flux through the area of the loop using the answer for B and…
- What is the direction of the induced current in resistor A when coil B is moves to the left and then stops moving? there is no current O from left to right O form right to leftThe solenoid, shown below, carries positive current from left to right. The current is suddenly interrupted by removing the current source from the circuit. Which end of the solenoid will accumulate electrons due to self-induction?Shown in the following figure is a long, straight wire and a single-turn rectangular loop, both of which lie in the plane of the page. The wire is parallel to the long sides of the loop and is 0.5 m away from the closer side. At an instant when the voltage induced in the loop is 2.5 V, what is the time rate of change of the current in the wire? 0.50 m] 3.0 m 0.50 m a. What is the expression for magnetic field B due to the current I in the long, straight wire, at distance r away from the wire? B = . Give your answer in terms of given variables (I, r) and physical and numerical constants (o, T, ke, and/or c). Spell out Greek letters and use underscore ("_") for subscripts. b. Because the magnetic field is not uniform, you will have to use integration to calculate the magnetic flux, = = [₁ BdA. Find the magnetic flux through the loop as a function of I ( will be proportional to I, as shown below; find the coefficient, in base SI units). Hint for (b) Φ I. Give your answer in terms of given…
- Don't use chat gpt Chatgpt means downvoteA coil is placed in a uniform constant external magnetic field directed perpendicular to the plane of the coil. Which of the following actions would not induce an emf in the coil? a) Rotating the coil to change the angle ϕ b) Changing the strength of the magnetic field. c) Moving the entire coil in a direction parallel to the direction of the magnetic field d) Reducing the radius of the coil.A 120V e.m.f is across a transformer's 200-turn primary coil. How many turns should a secondary coil have in order to produce a 30V e.m.f?