4) A long solenoid has n=800 turns per meter and a current I = 2 sin(wt). Inside the solenoid with a= 0.5 m and coaxial with it is a coil that has a radius of b = 0.2 m and consists of N. = 200 turns in Figure. Circuit has a variable resistor, and at t=2 s resistor has 4 2. (a) Find the induced emf in the coil as a function of time if f=10 Hz. (b) Find the self-inductance of solenoid. (c) Find the current Ims of the circuit. (d) Write the expressions for E and B generated by solenoid in the form E = 4 sin(kx – wt) and B = Bmax sin(kx – wt) with numerical values for Bo k, and w when the wavelength A = 100 m, and the periot T=5 s. (µo = 4n × 10-7 T. m/A, c = 3 × 108 m/s) max Coil, Ne turns with radius b = 0.2 m Solenoid, n turns per meter I = 2 sin(wt) I = 2 sin(wt) V = 8 sin(wt) 4Ω Variable resistor

4) A long solenoid has n=800 turns per meter and a current I = 2 sin(wt). Inside the solenoid with a= 0.5 m and coaxial with it is a coil that has a radius of b = 0.2 m and consists of N. = 200 turns in Figure. Circuit has a variable resistor, and at t=2 s resistor has 4 2. (a) Find the induced emf in the coil as a function of time if f=10 Hz. (b) Find the self-inductance of solenoid. (c) Find the current Ims of the circuit. (d) Write the expressions for E and B generated by solenoid in the form E = 4 sin(kx – wt) and B = Bmax sin(kx – wt) with numerical values for Bo k, and w when the wavelength A = 100 m, and the periot T=5 s. (µo = 4n × 10-7 T. m/A, c = 3 × 108 m/s) max Coil, Ne turns with radius b = 0.2 m Solenoid, n turns per meter I = 2 sin(wt) I = 2 sin(wt) V = 8 sin(wt) 4Ω Variable resistor