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- Question
A copper wire of radius r and length lhas a resistance of R. A second copper wire with radius 2r and length lis taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be
Options- A. 5 R
- B. 5 R/4
- C. 4 R/5
- D. R/5
- Correct Answer
- R/5
Explanation1st copper wire: R = pl/A = pl/ ?r2
2ndcopper wire: R? = p?l?/A? = pl/(4 ?r2) = R/4
If joined in parallel, (1/Req) = (1/R) + (1/R?)
= 1/R + 4/R1/Req= 5/R
Req= R/5
- 1. Cartography is the science of
Options- A. coins
- B. maps
- C. cartoons
- D. None of the above Discuss
- 2. What allows a cell to respond to a hormone?
Options- A. hormone response element
- B. presence of hormone receptor
- C. Adrenocorticotropic
- D. None of the above Discuss
- 3. Jesse Owens Global award is given in the field of
Options- A. Literature
- B. Journalism
- C. Science
- D. Sports Discuss
- 4. A person who knows many foreign languages
Options- A. Grammarian
- B. Polyglot
- C. Linguist
- D. Bilingual Discuss
- 5. who was the first non-human to win an Oscar?
Options- A. Pussycat
- B. Mickey Mouse
- C. Ninja
- D. Bender Discuss
- 6. What is the major source of dietary sulfur?
Options- A. Proteins
- B. Carbohydrates
- C. Mineral salts
- D. All of the above Discuss
- 7. Exercise frequency refers to
Options- A. number of times you exercise per week
- B. number of times you exercise per month
- C. number of times you exercise per day
- D. All of the above Discuss
- 8. Which macronutrient is vital for every function of the body?
Options- A. Fats
- B. Carbohydrates
- C. Water
- D. Proteins Discuss
- 9. Teens who drink are at risk of
Options- A. HIV and other STDs
- B. becoming an alcoholic
- C. date rape
- D. All of the above Discuss
- 10. Who was the first person to receive a Jnanpith award for a Telugu work ?
Options- A. C. Narayana reddy
- B. Viswanatha Satyanarayana
- C. Ravuri Bharadwaja
- D. Srirangam Srinivasarao Discuss
More questions
Correct Answer: maps
Explanation:
Cartography is the science which deals with the study and practice of making maps.
Correct Answer: presence of hormone receptor
Correct Answer: Sports
Correct Answer: Linguist
Correct Answer: Mickey Mouse
Explanation:
Mickey Mouse was the first non-human to win an Oscar in 1932.
Walt Disney won the first of his many Oscars for the creation of Mickey Mouse.
Correct Answer: Proteins
Explanation:
Protein cantaining foods are the major source of dietary sulfur. Foods like eggs are rich in sulfur content.
Correct Answer: number of times you exercise per week
Explanation:
Exercise frequency refers to number of times you exercise per week.
Correct Answer: Water
Explanation:
The macronutrient water is the most essential nutrient which plays a vital role in every function of the body. Macronutrients are those nutrients that are required in excess amounts for the development and functioning of the body.
Correct Answer: All of the above
Correct Answer: Viswanatha Satyanarayana
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