In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most?
A. A B. B C. C D. D E. E Correct Answer: Option E – E
If the frequency of the e.m.f. source in the a.c. circuit illustrated below is 500/π Hz. What is the reactance of the inductor?
A. 450 B. 0.9 C. 900 D. 567 E. 43 Correct Answer: Option C – 900 Explanation x = 2πfL=2π×500/π ×0.9 = 900Ω
A particle of charge q and mass m moving with a velocity v enters a uniform magnetic field b in the direction of the field. The force on the particle is?
A. qvB B. mqvB/m C. mvB/q D. O Correct Answer: Option D = O
In which of the following is a stationary wave produced?
i. A vibrating tuning fork held near the end of a resonance tube closed at one end. ii. A string tightly stretched between two points and plucked at its middle. iii. The tuning fork vibrating in air A. i only B. ii only C. i and ii only D. ii and iii only E. i, ii and...Products
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