Question

1. A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N₂/N₁ for a particular transformer used in a CD player is 3:43. When used with 120-V (rms) household service, the transformer draws an rms current of 170 mA.

(a) Find the rms output voltage of the transformer.
? V

(b) Find the power delivered to the CD player.
? W

2.What velocity would a proton need to circle Earth 1,285 km above the magnetic equator, where Earth's magnetic field is directed horizontally north and has a magnitude of  

4.00 ✕ 10⁻⁸ T?

(Assume the raduis of the Earth is 6,380 km.)

magnitude	? m/s
direction	---Select--- to the west to the north to the south to the east

3.A sinusoidal voltage

Δv = (75.0 V)sin(120t)

is applied to a series RLC circuit with

L = 90.0 mH,

C = 115.0 μF,

and

R = 48.0 Ω.

(a) What is the impedance of the circuit?
? Ω

(b) What is the maximum current in the circuit?
? A

4.

What is the maximum current delivered to a circuit containing a 4.00 µF capacitor when it is connected across the following outlets?

(a)

a North American outlet having ΔV_rms = 120 V, f = 60.0 Hz

?mA

(b)

a European outlet having ΔV_rms = 240 V and f = 50.0 Hz

?mA

Answer 1

1. by toans former equation NpVs ( N2 Ns Vp X120 43 Vs = 3 IN2 NI NS = Ne 2 Vs . 8.37 Voit (6 Pa Virms & I 120 X 00170 = 20.4 w as other Questions seperately Please Upload per HomeworkLib policy