Factors that affect the strength of electromagnets are the nature of the core material, strength of the current passing through the core, the number of turns of wire on the core and the shape and size of the core.Nov 28, 2020

Explanation:

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3 years ago

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What is the maximum power that can be delivered by a 1.4-cm-diameter laser beam propagating through air

Aleksandr-060686 [28]

Complete Question

The maximum electric field strength in air is 4.0 MV/m. Stronger electric fields ionize the air and create a spark. What is the maximum power that can be delivered by a 1.4-cm-diameter laser beam propagating through air

Answer:

The value is $P = 3.270960 *10^{6} \ W$

Explanation:

From the question we are told that

The electric field strength is $E = 4.0 \ M \ V/m = 4.0 *10^6 \ V/m$

The diameter is $d = 1.4 \ cm = 0.014 \ m$

Generally the radius is mathematically represented as

$r = \frac{d}{2}$

=> $r = \frac{0.014}{2}$

=> $r = 0.007 \ m$

Generally the cross-sectional area is mathematically represented as

$A = \pi r^2$

$A = 3.142 * (0.007)^2$

$A = 0.000154 \ m^2$

Generally the maximum power that can be delivered is mathematically represented as

$P = \frac{c * \epsilon_o * E^2 * A }{2}$

Here c is the speed of light with value $c = 3.0*10^{8} \ m/s$

$\epsilon_o$ is the permittivity of free space with value $\epsilon_o = 8.85 *10^{-12} \ m^{-3} \cdot kg^{-1}\cdot s^4 \cdot A^2$

$P = \frac{3,0*10^8 * 8.85*10^{-12} * (4 *10^6)^2 * 0.00154}{ 2}$

$P = 3.270960 *10^{6} \ W$

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3 years ago

Bill leaves his 60 W desk lamp on every day, including weekends, for eight hours. After one month (30 days), how much total ener

PolarNik [594]

First multiply the 30 days by 8 hours to get 240, then take that number and multiply it by 60 W to get the final answer of 14400.
hope this is correct, I'm learning it too

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4 years ago

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