phy

Midterm Fall 2021: PHY 12 Choose two (2) essays of your choice in the list of the essays. Please, show all work on the Problems. No work must be shown on the multiple-choice questions (just circle the correct answer).

Name:

ESSAY 1: (Maximum 400 words)

ESSAY 2: (Maximum 400 words)

Multiple Choices

1.

2.

3.

4.

5.

6.

7.

Problems:

Problem 1:

Problem 2:

Problem 3:

Problem 4:

Problem 5:

Problem 6:

Problem 7:

Problem 8:

A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -40 uC.

a) How many excess electrons does she get?

b) By how much does her mass increase?

Problem 9:

Draw, approximately, the electric field lines about two point charges, +Q and -3Q, which are a distance d apart.

Problem 10:

Problem 11:

Problem 12:

Problem 13:

Calculate the total electric field (magnitude and direction) at point A in the following figure due to both charges, Q1 and Q2.

Q2= +20 U C Q1= -20 U C