A cycle wheel has 10 spokes each of length 0.5m long is rotated at a speed of 18 km/hr in a plane normal to the earth's maquetic induction of 3-6×10°57. Calculate the enf induced between the 4 axle and the rim of cycle wheel 6 ends of single spoke and ten spokes
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- An electric motor does not function properly without a commutator. What is a commutator?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…A simple AC generator consists of 10 turns of coils with an area of 1 000 cm2. It rotates at a constant period of 1/60 s in a region where the magnetic field is 0.40 T. What is the peak electromotive force of the generator?
- Question 3: Induction (a) The accompanying figure shows a single-turn rectangular coil that has a resistance of 2.0/2. The magnetic field at all points inside the coil varies according to B = Boe-at, where Bo = 0.25T and a = 200Hz. What is the current induced in the coil at (a) t = 0.001s, (b) 0.002 s, (c) 2.0 s? x x x x x X X 5.0 cm X x x X x x X X x B x 2.0 cm X (b) How would the answers to the preceding problem change if the coil consisted of 20 closely spaced turns? Note that the resistance would increase by 2.00 per coil as well.For a coil of unit area, induction is doubled in 0.2s. Then the induced e.m.f. is (a) 5 B (b) 10 B (c) 8 B (d) 4 BA straight conductor (rod) of length 0.4 m is rotated about one end at a constant 6280 rad/s in plane normal to a uniform magnetic field of induction 3 x 10 5 T. Calculate the emf induced between its ends.
- #ASAPsuppose a conducting rod with length of 25cm is pulled along the a rotated U-shaped conductor (assume that resistance is negligible), the magentic field has a constant value of 37.2 mT and the constant velocity at which the rod is pulled is 5.5m/s. identify the minimum rate of energy input to the system to keep the rod moving at constant velocity if it has a resistance of 7ohmsThe field outside the coils of the solenoid is nearly zero. Why?
- Can the left-hand rule be used to determine the direction of rotation of an electric motor? Why or why not?In which situation is there no end induced in a particular coil A Changing the magnetic field applied on the coil B moving the coil itself through a magnetic field C Suspending the coil within the magnetic field D Moving the magnetic field around the coil