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Physics

Chapter 4 - Alternating Current AC Circuits

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Chapter 5 - Dual Nature of Wave and Particle

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Chapter 6 - Atomic Spectra and X-Rays

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Chapter 7 - Lasers and Principles

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Chapter 8 - Modern Electronics and Semiconductors

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Quiz

Lesson 1: Electric Current, Potential Difference, Resistance and Resistivity — Lesson quiz

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1.
If a metallic copper wire of resistance R is stretched uniformly such that its length increases by 20%, what is its new resistance?
0.83 R
1.44 R
1.20 R
1.40 R
2.
Pascal's principle states that when pressure is applied to an enclosed, incompressible fluid, it is transmitted:
With an exponential decay as distance increases
Only downwards towards the bottom of the vessel
Undiminished to every portion of the fluid and to the walls of the containing vessel
Strictly to compressible gases
3.
In a hydraulic press, the ratio of the cross-sectional area of the large piston to that of the small piston is 50. If a force of 100 N is exerted on the small piston, the maximum force exerted by the large piston is:
5000 N
50,000 N
2500 N
2 N
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