A ring with an internal area of 25 cm2 has a current of 250 mA. If...
A current loop in a motor has an area of 1.95 cm2 . It carries a 240 mA current in a uniform field of 0.62 T . Part A What is the magnitude of the maximum torque on the current loop? Express your answer with the appropriate units.
A current loop in a motor has an area of 0.85 cm2. It carries a 240 mA current in a uniform field of 0.62 T . What is the magnitude of the maximum torque on the current loop? Express your answer using two significant figures. τ = __________N*m
5. An iron ring with a cross-sectional area of 3 cm2 and a mean circumference of 75 cm is wound with 250 turns wire carrying a current of 0.3 A. The relative permeability of the ring is 7500. Calculate the flux established in the ring.
A flat, 172-turn, current‑carrying loop is immersed in a uniform magnetic field. The area of the loop is 6.55 cm2 and the angle between its magnetic dipole moment and the field is 30.5∘. Find the strength B of the magnetic field that causes a torque of 1.23×10−5 N⋅m to act on the loop when a current of 2.73 mA flows in it.
A coil is free to rotate in a magnetic field with a flux density of 33 mT. The coil has 50 loops and an area of 25 cm2. A current of 0.75 amps flows through the coil. When the plane of the coil makes a certain angle with the magnetic field, the torque on the coil is 2.8 × 10–3 N m. If the coil rotates until this angle is doubled, what is the percentage change in torque?
A parallel-plate capacitor has a plate area of A = 250 cm2 and a separation of d = 2.00 mm. The capacitor is charged to a potential difference of V0 = 150 V by a battery. A dielectric sheet (κ = 3.50) of the same area but thickness ℓ = 1.00 mm is placed between the plates without disconnecting the battery. (See figure 24-18 on page 642). Determine the electric field in the dielectric. Determine the free charge on the...
A 195 turn coil has an area of 5 cm2 and rotates in a magnetic field of 0.5 T. (a) What frequency will generate a maximum EMF of 10 V?
A current loop in a motor has an area of 1.75 cm^3. It carries a 240 mA current in a uniform field of 0.62 T. What is the magnitude of the maximum torque on the current loop?
A parallel-plate capacitor has a plate area of A = 250 cm2 and a separation of d = 2.00 mm. The capacitor is charged to a potential difference of V0 = 150 V by a battery. A dielectric sheet (κ = 3.50) of the same area but thickness ℓ = 1.00 mm is placed between the plates without disconnecting the battery. (See figure 24-18 on page 642). Determine the initial capacitance of the air-filled capacitor. Determine the charge on the...
QUESTION 22 A horizontal power line of length = 58.0 m carries a current of 1 = 2.20 kA northward as shown in th figure. The Earth's magnetic field at this location has a magnitude of B = 5.00.1051. The field at this location is directed toward the north at an angle = 65.0" below the power tine. Find the magnitude Fand the direction of the magnetic force on the power line. South North F: 2.70 N. into the page....