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Physics Questions Answers
Physics Questions Answers is your go-to resource for mastering the fundamental and advanced concepts of physics. Whether you're a student preparing for exams, a teacher in search of reliable materials, or a science enthusiast eager to delve deeper into the principles of physics, this platform offers a comprehensive range of questions and answers. Covering diverse topics such as classical mechanics, electromagnetism, thermodynamics, and quantum physics, each question is designed to challenge and expand your understanding. The detailed answers provide clear explanations and insights, making complex topics more accessible. Regular updates ensure that the content stays current with the latest educational standards and scientific advancements. Whether you're studying for academic purposes, tackling homework, or simply exploring the wonders of the physical world, Physics Questions Answers is your essential tool for achieving a thorough and well-rounded grasp of physics.
When does a gas behave like an ideal gas?
high pressure and low temperature
low pressure and high temperature
high pressure and high temperature
low pressure and low temperature
Consider the following elements:
I. Cobalt
II. Gold
III. Nickel
IV. Silver
Which of these are magnetic substances?
I and II
I and III
II and IV
III and IV
Which device always forms a virtual and small image?
concave lens
concave mirror
convex lens
glass plate
In what form is energy stored in an electric coil?
dielectric strength
electrostatic strength
heat
magnetic field
Who developed Hydrogen Bomb?
Wernher Von Braun
J. Robert Oppenheimer
Edward Teller
Samuel Cohen
A DC voltmeter is capable of measuring a maximum of 300 volts. If it is used to measure the voltage across a device operating at 220-volt AC supply, the reading of the voltmeter will be
300 volts
220 volts
110 volts
0 volt
Which phenomenon cannot be attributed to refraction of light?
Twinkling of stars
Mirage
Rainbow
Red Shift
Why does milk look white?
Absorbs light
Contains proteins
Contains sugars
Reflects the incident light
What is the core of a transformer made of?
Soft iron
Steel
Copper
Aluminium
A source of sound has a noise level of 20 dB. If the intensity of sound produced by the source increases by 100 times, the noise level becomes —
30 dB
40 dB
400 dB
20,000 dB
Which one of the following metals has the highest density?
Gold
Iron
Platinum
Lead
Consider the following statements:
Radioisotopes are used —
1. in the diagnosis of certain diseases.
2. for determining the age of rocks
3. in radiation therapy.
4. for computing the age of very old monuments
Which of these statements is/are correct?
1 and 3
2 and 4
1, 2, 3 and 4
1 only
What is the main constituent of cosmic rays?
High energy proton
High energy electron
High energy infra-red radiation
High energy ultraviolet rays
Which colour suffers minimum deviation when white light undergoes dispersion by a prism?
Green
Red
Violet
Yellow
Who first enunciated the Quantum Theory?
Niels Bohr
Albert Einstein
Max Planck
Max Born
Consider the following electromagnetic waves:
1. X-rays
2. γ-rays
3. microwaves
4. radio waves
What is the correct sequence in the order of their increasing energy?
4, 3, 1, 2
1, 3, 2, 4
4, 2, 1, 3
1, 4, 3, 2
What is Bernoulli's theorem based on?
momentum
mass
energy
angular momentum
How long can a 100w bulb burn on one unit of electricity?
1 hour
5 hour
10 hour
20 hour
The circuit element where the impressed voltage is always in phase with the resulting current is —
an ideal resistor
an ideal capacitor
an ideal coil
an ideal transformer
"It is impossible to make an exact measurement of both the position and momentum of a particle on the atomic scale." Who proposed this?
Einstein
Heisenberg
Pauli
Schrodinger