Question

For all types of materials, resistivity is directly proportional to temperature for a moderate range (less...

For all types of materials, resistivity is directly proportional to temperature for a moderate range (less than 100 °C). Is it true or false?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1 
 ANS- yes

Temperature Dependence of Resistivity

The resistivity of materials depends on the temperature. ρt = ρ0 [1 + α (T – T0) is the equation that shows the relation between the temperature and the resistivity of a material. In the equation ρ0 is the resistivity at a standard temperature, ρt is the resistivity at t0 C, T0  is the reference temperature and α is the temperature coefficient of resistivity.

the resistivity of conductors (metals) is directly proportional to the temperature.

ρt = ρ0 [1 + α (T – T0)

( is positive for metals)

but in the case of semiconductor, the resistivity is inversely proportional to the temperature.

ρt = ρ0 [1 + α (T – T0)

( is negative for semiconductos)

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Answer True and false 1.The solubility of gases is directly proportional to the temperature and the...
Answer True and false 1.The solubility of gases is directly proportional to the temperature and the partial pressure of the gas over solution 2. Raoult's Law (Psol=Psolv x Xsolv) indicates that when the mole fraction of the failure increase, vapor pressure of the solution increases. Please give answer for number 3 multiple choice. "What are the major solute-solvent interactions created when KBr dissolves in water." A) dipole- dipole, B) dispersion, C)hydrogen bonding , D)ion-dipole.
A patient with moderate hypertension is to be treated with a diuretic drug. Drug A and...
A patient with moderate hypertension is to be treated with a diuretic drug. Drug A and drug B are two diuretics with the same mechanism of action. Drug A in a dose of 500 mg produces the same magnitude of diuresis as 5 mg of Drug B. Which of the following is true? Explain your reasoning. . A. Drug A is less efficacious than Drug B. B. Drug B is 100 times more potent than Drug A. C. Toxicity of...
PLEASE ANSWER ALL PARTS FOR A THUMBS UP RATING! THANK YOU! 1) In the journal entries...
PLEASE ANSWER ALL PARTS FOR A THUMBS UP RATING! THANK YOU! 1) In the journal entries to record the issuance of materials into production, the costs of both direct and indirect materials are credited to the Materials Inventory account and debited directly to Work in Process Inventory. True False 2) Because service departments do not directly contribute to the production of goods, their costs are generally considered period costs rather than assigned to an individual product, department or activity. True...
All corporate contributions benefit the donors directly. True or False A public issue is defined as...
All corporate contributions benefit the donors directly. True or False A public issue is defined as one that is of mutual concern to an organization and at least two or more of the organization's stakeholders. True or False Inversion is the process of merging with a foreign company and relocating your headquarters to the foreign country for the purpose of expanding market share. A) True B) False The tremendous power of the world's largest corporations have primarily a negative in...
1a. In the Starnes-Brenner case, two types of payments were made. The payment made to the...
1a. In the Starnes-Brenner case, two types of payments were made. The payment made to the jefe engineer is considered as __________________. 1b. In the Starnes-Brenner case, two types of payments were made. The payment made to the dock boss is considered as __________________. 1c.Based on U.S. laws, the payment made to the jefe engineer is considered as a/an ______________ payment. A)legal B)illegal 1d. Based on U.S. laws, the payment made to the dock boss is considered as a/an ________________...
11. The following types of income are generally taxable except:            Group of answer choices a. Rental...
11. The following types of income are generally taxable except:            Group of answer choices a. Rental income c. Life Insurance Death Benefits b. Dividends d. Prizes and awards 12.Social Security benefits are always considered taxable income. Group of answer choices True False 13.All tax credits are refundable. Group of answer choices True False 14.Deductions are generally more favorable to taxpayers than credits. Group of answer choices True False 15.All taxpayers are eligible for the earned income tax credit. Group of...
LEED is for all building types and all building phases including new construction, interior fit outs,...
LEED is for all building types and all building phases including new construction, interior fit outs, operations and maintenance and core and shell. True False The (3) levels of LEED credentials a person can achieve is: a. certified, green associate, fellow b. LEED AP, LEED Green Associate, LEED Fellow c. certified, gold, silver d. silver, gold, platinum The (4) LEED certification levels a building can achieve are: a. certified, silver, gold, platinum b. none of the choices c. green associate,...
For which types of patients with diabetes should a less stringent approach for HbA1c reduction be...
For which types of patients with diabetes should a less stringent approach for HbA1c reduction be appropriate? Those with prior cardiovascular disease Newly diagnosed without other comorbidities Those with shorter duration of diabetes Those without evidence of nepropathy, retinopathy, and/or neuropathy Which of the following factors can raise HDL-cholesterol? Aerobic physical activity Weight loss Smoking cessation b and c only All of the above Which of the following is true regarding the Diabetes Prevention Program ? It compared the effects...
Select all true statements. 195 oF is a higher temperature than 100 oC given the same...
Select all true statements. 195 oF is a higher temperature than 100 oC given the same pressure. The amount of greenhouse gases in the atmosphere have increased dramatically over the last half-century. The heat of vaporization is the amount of energy needed to convert a substance completely from a liquid to a gas at the boiling point. Two objects in thermal equilibrium are at the same temperature. In general, as external pressure increases, the temperature for boiling water decreases.
7) IPOs that are generally made available to the average investor tend to be the less...
7) IPOs that are generally made available to the average investor tend to be the less desirable new offerings. true or false 8) Shareholders have the option of selling their rights granted via a rights offering. true or false 15) With respect to dividend payments on stocks, the date of record is the date on which the payment is actually paid. true or false 16) Investors should never pay more than par value for a stock. true or false 18)...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT