Question 1 U(X10-2j) 4 0 r (fm) 0 20 40 The figure provided shows the potential

Question

Question 1 U(X10-2j) 4 0 r (fm) 0 20 40 The figure provided shows the potential energy of a proton, q e, and a lead nucleus, q 82e If a proton is fired toward a lead nucleus from a large distance away, how much initial kinetic energy does the proton need to reach a turning point 5.00 fm from the nucleus? O 1.00x10-12 O 2.00x10-12j O 3.00x10-12 O 4.00x10-12j Question 2 A capacitor with plates separated by 0.0270 m is charged to a potential difference of 8.50 V All wires and batteries are then disconnected, and the two plates are pulled apart to a new separation distance of 0.0540 m. If the initial electric field strength is 315 N/C, what is the electric field after the increase in separation? O 1.26x103 N/C O 630. N/C O 158 N/C O 315 N/C

Explanation / Answer

Q1

Energy required=K*e*82e/r

We got

Energy=3.77*10^(-12) J

So 4*10^(-12) J

Q2

After disconnection

Q remain same

New C=C'=C*0.027/0.054=C/2

New V=Q/C'=2V=17 V

E=V/d=315 N/C

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