공대생의 공부공간

문제)위와 같이 회로가 구성되어 있고, R = 6.00 Ω, l = 1.20 m, |B| = 2.50 T라고 가정할 때 아래 두 문제를 풀어라.(a) Calculate the applied force requred to moce the bar to the right at a constant speed of 2.00 m/s.(b) At what rate is energy delivered to the resistor?. 풀이)(a) Φ = Blx임을 이용한다.또한 constant speed of 2.00 m/s로 움직이게 하는 applied force이므로, acceleration = 0이다. Bar을 일정한 속력 v로 움직이게 하는 것을 가정하고 있기 때문에 x = vt로 표현할 수 있다. 따라서 Φ =..

문제)위의 그림과 같이 배치되어 있다고 가정하자.(a) Determine the magnetic flux through the loob due to the current I.(b) Suppose the current is changing with time according to I = a + bt (a and b are constants). Determine the induced emf in the loop if b = 10.0 A/s, h = 1.00 cm, w = 10.0 cm, L = 1.00 m.(c) What is the direction of the induced current in the rectangle? 풀이)(a)  Φ = ∫ B dA 임을 이용. dΦ = B dA  전류 I가 흐르는 ..

문제)A 30-turn circular coil of radius 4.00cm and resistance 1.00Ω is placed in a magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field is B = 0.0100t + 0.0400t^2 (T) Calculating the induced emf in the coil at t = 5.00s 풀이)induced emf ε = -N × dΦ / dt임을 이용한다. N = 30radius of coil = 4.00cm = 4.00 × 10^-2 mresistance of coil = 1.00 Ωmagnetic field B = 0...