Which of the following is found using Lenz’s law? a) Induced emf b) Induced current c) The direction of induced emf d) The direction of alternating current
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Which of the following is found using Lenz’s law?
a) Induced emf
b) Induced current
c) The direction of induced emf
d) The direction of alternating current
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- The magnetic field going through a square loop of wire changes according the the graph of B vs t shown. In each interval show on the graph select if the current induced in the wire loop is clockwise, counterclockwise or zer~Vout ARMATURE 1491677 2854 THEZZ ROTATING STATOR FIELD COIL CORE DC EXCITATION A simple model of an electric generator consists of a square coil with 10 turns of wire, rotating in a uniform magnetic field B, as Parameters are given below. Determine the maximum emf around the coil. shown. Parameter values: B = 0.38 T; period of rotation = 0.1 s; (in V) dimensions of the coil= 10 cm by 10 cm. OA: 1.089 OB: 1.274 OC: 1.491 OD: 1.744 OE: 2.041 OF: 2.388 OG: 2.794 OH: 3.2681-Which of the following sensors has a permanent magnet inside? Hall effect sensor thru-beam optical sensor piezo-electric sensor LVDT capacitive proximity sensor 2- The reason a LVDT can detect position of its core even when the core is not moving, is that, the central coil is moving. the two pickup coils on either side of the central coil are supplied by AC current. the central coil is supplied by DC current. the central coil is supplied by AC current.
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- Energy Storage in Magnetic Fields Due in 58 minutes A coil with an inductance of 19.4 H and a resistance of 2.2 2 is suddenly connected to a resistanceless battery with an ε = 82.0 V. At 0.51 s after the connection is made, what is the rate at which energy is being stored in the magnetic field? Submit Answer Tries 0/10 What is the rate at which thermal energy is appearing, Submit Answer Tries 0/10 What is the rate at which energy is being delivered by the battery?a) At what position is it cutting the field lines fastest? b) At what position is its vertical velocity zero? c) Why is no current induced when the coil is vertical?A rectangular conducting loop is placed near a long wire carrying a current I as shown in the figure below. If I increases in time, what can be said of the current induced in the loop? a) The direction of the current depends on the size of the loop. b) The current is clockwise c) The current is counterclockwise d) The current is zero. e) Nothing can be said about the current in the loop without more information
- What is the radius of a tightly wound solenoid of circular cross-section that has 170 tusifa change in its internal magnetic field of 40T/s causes a 70 A current to flow/ The restance of the circuit that contains the solenoid is 150. The only emf source for the circuit is the induced eml. a) 0.22 m b) 0.059 m c) 0.015 m d) 0.79 mThe switch K in the circuit shown in the figure is open, and there is no current in the coil. At a given moment we close the switch. a) Find the current and the voltage of the resistors and the coil right after the close of the switch. After waiting until the current becomes constant in the circuit, we open the switch. b) Find the current and the voltage of the resistors and the coil right after the open of the switch.