The magnetic field strength=1.46 x 10⁻⁵ T
Explanation:
the magnetic field is given by
B=
μo= 4π x 10⁻⁷ Tm/A
i= current= 4.1 A
r=0.056 m
B= (4π x 10⁻⁷)(4.1) / (2π*0.056)
B=1.46 x 10⁻⁵ T
A. The formula for mean free time is:
t = V/(4π√2 r²vN)
where
N = 1×10¹⁶ molecules (per m³)
V = 1 m³
r = 111×10⁻⁷m (atomic radius of silicon)
Let's solve for v first:
v = √(3RT/M) = √(3(8.314 m³·Pa/mol·K)(25 + 273 K)/28.1 g/mol Si)
v = 16.26 m/s
t = (1 m³)/(4π√2 (111×10⁻⁷m)²(16.26 m/s)(1×10¹⁶ molecules))
<em>t = 2.81×10⁻9 s</em>
<em>Pure silicon has a high resistivity relative to copper because copper is a conductor, while silicon is a semi-conductor. </em>
Answer:
3.0 V
Explanation:
The voltage across the bulb is the voltage across the batteries, since the batteries are the only source of power for the bulb. So the voltage across the batteries is 3.0 V.
1. Scattering
2.speculated reflection
3.diffuse reflection