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Physics

Chapter 1 - Electric Current, Ohms Law and Kirchhoffs Laws

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Chapter 2 - Magnetic Effects of Electric Current and Measuring Instruments

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Chapter 3 - Electromagnetic Induction and AC Dynamo and Transformer

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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 Quiz: The Hot-Wire Ammeter and Single Element AC Circuits

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1.
Boyle's Law states that for a fixed mass of an ideal gas kept at constant temperature, the volume V is:
Directly proportional to pressure
Independent of pressure changes
Inversely proportional to its absolute pressure P (P1 * V1 = P2 * V2)
Directly proportional to absolute temperature
2.
The volume expansion coefficient at constant pressure (alpha_v) and the pressure expansion coefficient at constant volume (beta_p) for all ideal gases have the universal constant value of:
1.013 x 105 Pa
1 / 273.15 K−1 (approx. 0.00366 K−1)
273.15 K
8.314 J/(mol.K)
3.
A gas cylinder contains 10 liters of gas at a pressure of 3.0 atm. If the volume is reduced to 2.5 liters at constant temperature, the new pressure inside the cylinder will be:
6.0 atm
7.5 atm
12.0 atm
1.2 atm
4.
When a gas trapped inside a rigid container of fixed volume is heated from 27 °C (300 K) to 127 °C (400 K), its pressure increases by a factor of:
127 / 27
2 times
16 / 9
4 / 3 (since P1 / T1 = P2 / T2)
5.
A fixed quantity of an ideal gas has a volume of 600 cm3 at 27 °C. If the gas is heated to 127 °C under constant pressure, its new volume will be:
800 cm3
1200 cm3
700 cm3
900 cm3
6.
If both the absolute temperature and the absolute pressure of a confined ideal gas are doubled, the volume of the gas:
Remains constant and unchanged
Decreases to one-fourth
Doubles to twice its original volume
Quadruples
7.
The density of an ideal gas at temperature T and pressure P is rho. If the pressure is tripled and the absolute temperature is halved, the new density becomes:
3 rho
0.67 rho
1.5 rho
6 rho (since rho is proportional to P / T)
8.
The volume expansion coefficient at constant pressure (alpha_v) of an ideal gas is physically measured using:
A venturi meter and manometer
A hydrometer
Joly's bulb apparatus or Charles's apparatus with a dry mercury droplet index
A torsion balance
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