The quantity of charge q (in coulombs) that has passed through a surface of area 2 cm² varies with time according to the equation q = 2t³ +4t-6, where t is in seconds. What is the value of the current density (A/m²) at t = 2.0 s? 1. 00.5 × 105 2. 01.4 x 105 3. 02.9 × 105 4. 05.0 × 105 5. 07.7 x 105

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The quantity of charge q (in coulombs) that has passed through a surface
of area 2 cm² varies with time according to the equation q = 2t3+ 4t-6,
where t is in seconds. What is the value of the current density (A/m²) at t
= 2.0 s?
1. 00.5 × 105
2. 01.4 x 105
3. 02.9 × 105
4. 05.0 × 105
5. 07.7 x 105
Transcribed Image Text:The quantity of charge q (in coulombs) that has passed through a surface of area 2 cm² varies with time according to the equation q = 2t3+ 4t-6, where t is in seconds. What is the value of the current density (A/m²) at t = 2.0 s? 1. 00.5 × 105 2. 01.4 x 105 3. 02.9 × 105 4. 05.0 × 105 5. 07.7 x 105
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