A rectangular coil 27 cm by 39 cm has 140 turns. This coil produces a maximum emf of 66 V, when it rotates with an angular speed of 200 rad/s in a magnetic field of strength B. Part A Find the value of B. Express your answer using two significant figures. B= || ΑΣΦ DANO ? mT

the loop is A ab The figure below shows a rectangular loop with a resistance of 6.7 2. The area of 0.0026 m². The magnetic field throughout the region is A = 48 T/s. How much current is induced in the loop, AB increasing at a rate of in units of milli-Amps (mA)? 24,96,91,88 X X Your Answer: Answer x X CO x X X * X X x X B

A dc generator is rated at 20 kW, 250 V, and 80 A when it rotates at 1500 rpm. The resistance of the armature windings is 0.34 2. Part A Calculate the "no-load" voltage at 1500 rpm (when there is no circuit hooked up to the generator). Express your answer using two significant figures. V ΑΣΦ Val = 0 ? kV Review | Constants

The magnetic field through a single loop of wire 12.0 cm in radius and of 7.5 Ω resistance changes with time as shown in the figure. Calculate the emf in the loop as a function of time.What is the emf at t = 1.0 s? For the sign take the loop in the plane of the paper, and the magnetic field out of the paper. Take clockwise to be positive emf.  What is the emf at t = 3.0 s?  What is the emf at t = 5.0 s?  What is the current at t = 1.0 s?

In each of two coils the rate of change of the magnetic flux in a single loop is the same. The emf induced in coil 1, which has 245 loops, is 2.51 V. The emf induced in coil 2 is 4.90 V. How many loops does coil 2 have? Number i Units

A generator has a coil with 1260 turns that are each 0.020 m in diameter. The coil rotates at 3600 rpm in a 0.670 T magnetic field. If a 20.0 Ω resistive load is connected in parallel with the generator, what is the average power used by the load?   ____ W

The circuit in the figure below is located in a magnetic field whose magnitude varies with time according to the expression B = 1.00 x 10³ t, where B is in teslas and t is in seconds. Assume the resistance per length of the wire is 0.099 /m. Find the current in section PQ of length a = 60.0 cm. magnitude μA direction from Q to P a xxxxx * * * ** x Bin * * x X xx * * * xx x X xx 2a x x x x xx P xxxx xxxx **** * x x x x Q a

The 12.0 cm long rod as shown moves at 4.00 m/s.What is the strength of the magnetic field if a 95.0 V emf isinduced?

in the figure below, a square loop with 10 turns that is 10.0 cm on a side has a magnetic field pointed into the page that is decreasing at the rate of 1.0 T/s.   a) What is the magnitude of the emf generated in the wire  and what is the direction of the resulting current along the top side of the loops?       b) Assume the self inductance is 4.1 x 10-4 H and the wire’s resistance is 11 Ohms.  How much energy is stored by the inductor while the magnetic field is decreasing at this fixed rate?

A 10.0-cm-long wire is pulled along a U-shaped conducting rail in a perpendicular magnetic field. The total resistance of the wire and rail is 0.330 2. Pulling the wire at a steady speed of v = 4.00 m/s causes 3.50 W of power to be dissipated in the circuit. ▼ Part A How big is the pulling force? Express your answer with the appropriate units. F = Submit Part B B = A Value Submit μÀ Request Answer What is the strength of the magnetic field? Express your answer with the appropriate units. μA Value Units Request Answer 図]? Units ?