Question

1: During an electronics experiment in your laboratory, you measure the voltage at terminal A

on your newly designed circuit. You measure -12 volts. You check the same terminal after
making a small change to the circuit and this time you measure -18 volts. What was the voltage
difference between the two readings?

2: What is the change in temperature a customer in a grocery store experience when they walk from the chilled vegetable section at 4 c to the frozen fish section which is set to -18 c?

Answer 1

1) - 6 volts (or 6 volts drop)

2) -22°C (or 22°C drop)

Explanation:

1. ............................

Initial voltage = -12 volts

Later voltage = - 18 volts

The difference:

• -18 - (-12) = -18 + 12 = - 6 volts

2. ............................

Temperature in the chilled vegetable section = 4°C

Temperature in the frozen fish section = - 18°C

The difference:

• -18°C - 4°C = -22°C