The Resistance of a Platinum Wire Is to Be Calibrated

question 47

Multiple Choice

The resistance of a platinum wire is to be calibrated for low-temperature work.A platinum wire with resistance 2.000 Ω at 20°C is immersed in liquid nitrogen at 77 K (−196°C) .If the temperature response of the platinum wire is linear,what is the expected resistance of the platinum wire at −196°C? [α_platinum = 3.92 × 10−³ (°C) −¹].

• A) 0.153 Ω
• B) 1.768 Ω
• C) 3.69 Ω
• D) 0.307 Ω

---

Definitions:

Disposable Income

The pot of funds households have at their disposal for saving and spending, post-income tax.

MPC

refers to the Marginal Propensity to Consume, which is the fraction of additional income that a household spends on consumption.

Disposable Income

The cash flow available to households for the purposes of spending and saving after income taxes.

Disposable Income

Disposable Income is the amount of money that households have available for spending and saving after income taxes have been accounted for, directly influencing consumption and savings behavior.