A. repel if the sphere with radius is is that 13 lledall Ullalb larger the one t

Question

A. repel if the sphere with radius is is that 13 lledall Ullalb larger the one the B. attract each other C. repel each other D. exert no force on each other E. pel if the sphere with the smaller radius is the one that is negatively charged (2 points) In the figure Q 30 nC and d 30 cm. What is the magnitude of the net electric field at point P due to the two point charges? K, 30xlo 3Oxlo (20) 1.33 NIC 2d 3m .6 m (1 point) You have to replace a broken wire in a circuit. Your replacement wire is made of the same material, but has twice the diameter of the original wire. If the original wire was 10 cm long, how long must the replacement wire be if it is to have the same resistance as the original wire A. 5.0 cm B. 2.5 cm

Explanation / Answer

Q=30nC d=30cm

E1=kQ/r^2 = 9×10^9×30×10^-9 /(0.3)2=   3000N/C

E2=kQ/r^2 = 9×10^-9× 60×10^-9/(0.6)2 =1500N/C

Enet= 3000 -1500 =1500N/C to the right

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