two 5 ohm resistors are placed in a series and wired into a 100 v power supply what current flows through this circuit

HESI A2

HESI A2 Physics

1. Two 5-ohm resistors are placed in series and wired into a 100-V power supply. What current flows through this circuit?

A. 2 A
B. 10 A
C. 20 A
D. 50 A

Correct answer: B

Rationale: In a series circuit, the total resistance is the sum of the individual resistances. Therefore, the total resistance in this circuit is 5 ohms + 5 ohms = 10 ohms. Using Ohm's Law (V = I × R), we can find the current (I) by dividing the voltage (V) by the total resistance (R). I = V / R = 100 V / 10 ohms = 10 A. Choice A (2 A) is incorrect because it does not account for the total resistance of the circuit. Choice C (20 A) and Choice D (50 A) are also incorrect as they provide values that are not consistent with the calculations based on the given values in the question.

2. The shoulder is _________ to the elbow.

A. posterior
B. proximal
C. distal
D. medial

Correct answer: B

Rationale: Proximal refers to a position closer to the point of attachment or origin. In this case, the shoulder is closer to the point of attachment to the body compared to the elbow, making it proximal to the elbow. 'Posterior' refers to the back side of the body, 'distal' means farther away from the point of attachment, and 'medial' refers to the middle of the body. These terms do not accurately describe the relationship between the shoulder and the elbow in this context.

3. The word lethargy as used in the second paragraph of the passage can best be defined as ___________.

A. Sluggishness
B. Irritability
C. Energy
D. Starvation

Correct answer: A

Rationale: In this context, 'lethargy' refers to a state of sluggishness or lack of energy. The passage mentions that people with seasonal affective disorder (SAD) struggle with lethargy and chronic fatigue, impairing their daily lives. Therefore, the correct definition of 'lethargy' in this context is 'sluggishness.' Choice B, 'Irritability,' is incorrect as lethargy refers more to a lack of energy than to being irritable. Choice C, 'Energy,' is the opposite of lethargy. Choice D, 'Starvation,' is unrelated to the definition of lethargy in this context.

4. How much paint do you need to paint the interior walls and floor of a rectangular swimming pool with dimensions 8m by 5m and a depth of 2m? (Assume one can of paint covers 10 sq m)

A. 56 sq m
B. 72 sq m
C. 88 sq m
D. 104 sq m

Correct answer: C

Rationale: To calculate the total area to be painted, find the area of each wall and the floor, sum them up, and subtract the area of the top surface of the pool. The area to be painted is (2*8 + 2*5 + 8*5) = 16 + 10 + 40 = 66 sq m. Since one can of paint covers 10 sq m, divide the total area (66 sq m) by the coverage area per can to determine the number of cans needed. Therefore, you need 88 sq m of paint, which is equivalent to 9 cans of paint. Choice A, B, and D are incorrect as they do not represent the correct calculation of the total area to be painted.

5. Select the word that means 'open.'

A. inverted
B. patent
C. convent
D. converted

Correct answer: B

Rationale: 'Patent' is the correct answer as it means something that is open or unobstructed. Choices A, C, and D do not convey the meaning of 'open.' 'Inverted' means turned inside out or upside down, 'convent' refers to a religious community, and 'converted' means changed into a different form or function.