A 50-turn coil has a diameter of 15 cm. The coil is placed in a spatially uniform magnetic field of magnitude 0.50 T so that the face of the coil and the magnetic field are perpendicular. Find the magnitude of the emf induced in the coil if the magnetic field is reduced to zero uniformly in 1.0 s, 0.44 V 0.66 V 0.22 V 0.33 V
A square loop whose sides are 6.0−cm long is made with copper wire of radius 1.0 mm. If a magnetic field perpendicular to the loop is changing at a rate of 5.0 mT/s, what is the current in the loop? 0.099 A 0.088 A 0.055 A 0.022 A
A 50-turn coil has a diameter of 15 cm. The coil is placed in a spatially uniform magnetic field of magnitude 0.50 T so that the face of the coil and the magnetic field are perpendicular. Find the magnitude of the emf induced in the coil if the magnetic field is reduced to zero uniformly in 0.10 s, 3.3 V 4.4 V 8.8 V 6.6 V
A coil of 1000 turns encloses an area of 25 cm2. It is rotated in 0.010 s from a position where its plane is perpendicular to Earth's magnetic field to one where its plane is parallel to the field. If the strength of the field is 6.0×10−5 T, what is the average emf induced in the coil? 5 mV 15 mV 10 mV 20 mV
An automobile with a radio antenna 1.0 m long travels at 100.0 km/h in a location where the Earth's horizontal magnetic field is 5.5×10−5 T. What is the maximum possible emf induced in the antenna due to this motion? 0.0025 V 0.0030 V 0.0015 V 0.0035 V
A single-turn circular loop of wire of radius 50 mm lies in a plane perpendicular to a spatially uniform magnetic field. During a 0.10 s time interval, the magnitude of the field increases uniformly from 200 to 300 mT. Determine the emf induced in the loop. 5.5 × 10^−3 V 4.5×10^− 3 V 2.6×10^−3 V 7.8×10^−3 V
The current in a long solenoid with 20 turns per centimeter of radius 3 cm is varied with time at a rate of 2 A/s. A circular loop of wire of radius 5 cm and resistance 2 Ω surrounds the solenoid. Find the electrical current induced in the loop. μ0 = 4π×10−7 H/m 8.5 μA 9.0 μA 7.1 μA 10.0 μA
A flat, square coil of 20 turns that has sides of length 15.0 cm is rotating in a magnetic field of strength 0.050 T. If the maximum emf produced in the coil is 30.0 mV, what is the angular velocity of the coil? 1.33 rad/s 3.44 rad/s 2.55 rad/s 2.45 rad/s
Calculate the induced electric field in a 50-turn coil with a diameter of 15 cm that is placed in a spatially uniform magnetic field of magnitude 0.50 T so that the face of the coil and the magnetic field are perpendicular. This magnetic field is reduced to zero in 0.10 seconds. Assume that the magnetic field is cylindrically symmetric with respect to the central axis of the coil. 6.345 V/m 8.342 V/m 9.375 V/m 5.557 V/m