Question

given the following mas and ma values, calculate the exposure time.

	ma	time	mas
b.	300	type your an:	120
c.	200	type your an:	5
d.	600	type your an:	15
e.	400	type your an:	80

Explanation:

To calculate the exposure time, we use the formula:
\[ \text{time (seconds)} = \frac{\text{mAs}}{\text{mA}} \]

Part a:

Step1: Identify values

mA = 100, mAs = 75

Step2: Apply formula

\[ \text{time} = \frac{75}{100} = 0.75 \, \text{seconds} \]

Part b:

Step1: Identify values

mA = 300, mAs = 120

Step2: Apply formula

\[ \text{time} = \frac{120}{300} = 0.4 \, \text{seconds} \]

Part c:

Step1: Identify values

mA = 200, mAs = 5

Step2: Apply formula

\[ \text{time} = \frac{5}{200} = 0.025 \, \text{seconds} \]

Part d:

Step1: Identify values

mA = 600, mAs = 15

Step2: Apply formula

\[ \text{time} = \frac{15}{600} = 0.025 \, \text{seconds} \]

Part e:

Step1: Identify values

mA = 400, mAs = 80

Step2: Apply formula

\[ \text{time} = \frac{80}{400} = 0.2 \, \text{seconds} \]

Answer:

s:
a. \( 0.75 \, \text{s} \)
b. \( 0.4 \, \text{s} \)
c. \( 0.025 \, \text{s} \)
d. \( 0.025 \, \text{s} \)
e. \( 0.2 \, \text{s} \)