741PhysicsMedium
The number of beats produced per second is equal to____________________?
Athe frequency of either of the two tuning forks
MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
C. the difference of the frequencies of two tuning forks
Explanation
the difference of the frequencies of two tuning forks is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Dilates
Explanation
Dilates is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. 1/78 times
Explanation
The Coulomb force between two charges in a medium is given by Coulomb’s law, which states that the force is inversely proportional to the dielectric constant (relative permittivity) of the medium. Water has a high dielectric constant, which significantly reduces the Coulomb force between the charges. The dielectric constant of water is approximately 78. Therefore, the Coulomb force between two charges placed in water is reduced to: C. 1/78 times
Correct answer
C. Both B and D
Explanation
Both B and D is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. 23.6%
Explanation
Explain: formula n% = (1- T2/T1) ×100% T1= 273+150= 423K T2:273+50= 323K n% = (1- 323/423)×100% n% = 0.236×100% = 23.6% Correct
Correct answer
A. Both B and C are correct
Explanation
Both B and C are correct is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. all the above
Explanation
all the above is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. free electrons
Explanation
free electrons is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. They have zero phase difference
Explanation
They have zero phase difference is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. potential difference across galvanometer branch is zero
Explanation
potential difference across galvanometer branch is zero is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.