1. A single channel analyzer (SAC) was used for a pulse height analysis of the two peaks: 1.17 MeV and 1.33 MeV. The data are tabulated and graphed below. Volts (V) Counts (C) 9 49 8.9 56 88 61 8.7 88 8.6 189 8.5 416 8.4 902 8.3 1392 82 1808 8.1 1928 8 1553 7.9 1050 7.8 714 7.7 424 7.6 399 7.5 640 7.4 1364 7.3 2068 7.2 2483 7.1 2274 7 1699 6.9 1160 6.8 816 6.7 746 6.6 653 6.5 699 6.4 691 6.3 764 6.2 847 6.1 867 6 955 3000 2500 2000 1173 ev 1332 eV LM м Counts (C) 1500 1000 500 0 5.5 5.5 7 7.5 Volts (V) 8 8.5 9 9.5 From the data above, estimate the following: The background counts for both peaks The net counts for both peaks The net counting rate for both peaks if we know that the counts measured continuously over a period of 60 seconds.

3. Suppose that we have 2.10 X 10* doubly charged positive ions per cubic centimeter, all moving north with a speed of 1.40 X 10 m/s. (a) Calculate the current density, in magni- tude and direction. (b) Can you calculate the total current in this ion beam? If not, what additional information is needed?

11. Simulate the SDE dS(t) = 0.08Sdt + 0.1SdB(t) using a step-size of 100 with S(0) = 100.

engineering notation

5. Compute for the individual values and the total values of the voltage, the current, and the resistance of the series circuit here. R, = 100 A VOLTAGE, CURRENT, RESISTANCE, V Vs = 12v R2= 200 R3 =300 6. Draw a series circuit connecting a battery and four resistors with a total resistance of 15 Q. The total current in the circuit should be 3 A. 7. Compute the individual values and the total values of the voltage, the current, and the resistance of the circuit here. IT VOLTAGE, CURRENT, RESISTANCE, 12 V V, = 24v R1 R2 R3 R1=102 R2 200 R3 =300 70 Property of and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting nline, or transmitting in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise of any part of this document, without the prior written permission of SLU, is strictly prohibited. 2021.03.08 09:52

Part II. Kirchhoff's Laws in 3 loops. a. Find the necessary KVL/KCL equations to solve the problem. b. Compute for I1, I2, and I3 c. Resketch the circuit and label the current with the correct direction and values for each resistor. Note: For every wrong direction of a current, wrong value of current, or missing current for each resistor minus 1 point. d. Find V2, V4, V6, and V8 e. Find P2,P4, P6, and P8

1. A current of 15 amperes is passed for 15 hours across a potential drop of 15 volts. Determine:a. The energy that can be obtained in calories.b. Weight of water (in grams) that can be heated from 77oF to 212oF using the energy in (a).c. Weight of water in grams that can be heated from 77OF to 212OF (steam at atmospheric pressure using the energy in (a).

1. The number of wire gauges in the United States is growing. The diameter of the wire's cross section a. remains neutral b. decreases c. stays the same d. increases 2. If any of the following relationships exist between resistance and conductance, which one is it? a. direct relationship b. none c. inverse square relationship d. reciprocal relationship 3. With an increase in temperature, a material with a _____ temp, coefficient will increase in resistance, while a material with a ___ temp, coefficient will decrease in resistance a. zero, negative b. positive, zero c. negative, positive d. positive, negative

1. Write Ohm’s Law.  2. Can one be shocked by touching a wire carrying a very large current with a low voltage source?Why? 3. Interpret the significance of the shape and the y-intercept of the curve .

3. For a thin film sample under a square 4-point probe measurement, if the sheet resistance Rs 10.0 2/ and the resistivity of the Al film material is 2.8x10-10 cm, what is the thickness of the film?