Question

For a disk of radius R = 35 cm and  Q = 3 ✕ 10⁻⁶ C, calculate the electric field 3 mm from the center of the disk using all three equations. (Enter the magnitude.)

E = (Q/A)/260[1 - (2/(R? +22)1/2)], E = (Q/4)/2o[1 - 2/R), E = (Q/A)/280

Efirst	=	N/C
Esecond	=	N/C
Ethird	=	N/C

How good are the approximate equations at this distance?

Both the second and third values are within 5% of the first, most accurate value.The second value is within 5% of the first, most accurate value. The third value, however, is more than 10% different from the first value.    The third value is within 5% of the first, most accurate value. The second value, however, is more than 10% different from the first value.Both the second and third values are more than 10% different from the first, most accurate value.

For the same disk, calculate E at a distance of 9 cm (90 mm) using all three equations.

Efirst	=	N/C
Esecond	=	N/C
Ethird	=	N/C

How good are the approximate equations at this distance?

Both the second and third values are within 5% of the first, most accurate value.The second value is within 5% of the first, most accurate value. The third value, however, is more than 10% different from the first value.    The third value is within 5% of the first, most accurate value. The second value, however, is more than 10% different from the first value.Both the second and third values are more than 10% different from the first, most accurate value.

Answer 1

Dat ISt

Dat ae 20.00003 Et

ate 2. 2 2. 2 3S

Date. 0o 331 moste