# Physics II Pt. 2

## Unlock all answers in this set

question What is the equivalent resistance of group (a) of resistors shown in the figure? (Figure 1)
Req = 11.0 ?
question What is the equivalent resistance of group (b) of resistors shown in the figure?
Req = 9.0 ?
question What is the equivalent resistance of group (a) of resistors shown in the figure? (Figure 1)
Req = 1.0 ?
question What is the equivalent resistance of group (b) of resistors shown in the figure? (Figure 1)
Req = 1.0 ?
question What is the equivalent resistance of group (c) of resistors shown in the figure? (Figure 1)
Req = 0.5 ?
question What is the equivalent resistance between points a and b in the figure? (Figure 1)
Rab = 24 ?
question What is the equivalent capacitance of the three capacitors in the figure? (Figure 1)
C = 37 ?F
question What is the equivalent capacitance of the three capacitors in the figure? (Figure 1)
C = 8.9 ?F
question What is the time constant for the discharge of the capacitors in the figure (Figure 1)?
? = 2.0 ms
question
The element niobium, which is a metal, is a superconductor (i.e., no electrical resistance) at temperatures below 9 K. However, the superconductivity is destroyed if the magnetic field at the surface of the metal reaches or exceeds 0.10 T. What is the maximum current in a straight, 4.0-mm-diameter superconducting niobium wire?
I = 1000 A
question
A solenoid used to produce magnetic fields for research purposes is 1.5 m long, with an inner radius of 25 cm and 1500 turns of wire. When running, the solenoid produced a field of 1.3 T in the center. Given this, how large a current does it carry?
I = 1.0 kA
question
The aurora is caused
46 cm ... 15 m
question
Early black-and-white television sets used an electron beam to draw a picture on the screen. The electrons in the beam were accelerated by a voltage of 3.0 kV; the beam was then steered to different points on the screen by coils of wire that produced a magnetic field of up to 0.68 T . What is the speed of electrons in the beam?
3.2 x 10? m/s
question What magnetic field strength will levitate the 2.0 g wire in the figure? (Figure 1) What is the direction of the magnetic field?