Physics Syllabus (JEE Main)
Q. Which of the following materials has the highest thermal resistance?
A.
Copper
B.
Aluminum
C.
Glass Wool
D.
Steel
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Solution
Glass Wool has the highest thermal resistance among the given materials, making it a good insulator.
Correct Answer: C — Glass Wool
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Q. Which of the following materials has the highest Young's modulus?
A.
Rubber
B.
Steel
C.
Wood
D.
Plastic
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Solution
Steel has a much higher Young's modulus compared to rubber, wood, and plastic, indicating it is much stiffer.
Correct Answer: B — Steel
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Q. Which of the following materials is commonly used as a p-type semiconductor?
A.
Silicon
B.
Germanium
C.
Gallium Arsenide
D.
Boron-doped Silicon
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Solution
Boron-doped Silicon is a common p-type semiconductor as boron creates holes in the silicon lattice.
Correct Answer: D — Boron-doped Silicon
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Q. Which of the following materials is commonly used as a semiconductor?
A.
Copper
B.
Silicon
C.
Aluminum
D.
Iron
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Solution
Silicon is widely used as a semiconductor material due to its suitable band gap and availability.
Correct Answer: B — Silicon
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Q. Which of the following materials is commonly used for potentiometer wires?
A.
Copper
B.
Aluminum
C.
Constantan
D.
Silver
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Solution
Constantan is commonly used for potentiometer wires due to its stable resistance over a range of temperatures.
Correct Answer: C — Constantan
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Q. Which of the following materials is commonly used for the wire in a potentiometer?
A.
Copper
B.
Aluminum
C.
Constantan
D.
Silver
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Solution
Constantan is commonly used for potentiometer wires due to its stable resistance over a range of temperatures.
Correct Answer: C — Constantan
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Q. Which of the following materials is commonly used in polarizers?
A.
Glass
B.
Plastic
C.
Polaroid
D.
Water
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Solution
Polaroid is a material specifically designed to polarize light.
Correct Answer: C — Polaroid
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Q. Which of the following materials is known to exhibit polarization?
A.
Glass
B.
Water
C.
Air
D.
Vacuum
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Solution
Glass can exhibit polarization when light reflects off its surface.
Correct Answer: A — Glass
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Q. Which of the following materials is most likely to exhibit elastic behavior?
A.
Rubber
B.
Glass
C.
Steel
D.
Plastic
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Solution
Steel is known for its elastic properties, allowing it to return to its original shape after deformation.
Correct Answer: C — Steel
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Q. Which of the following materials is the best conductor of heat?
A.
Wood
B.
Air
C.
Copper
D.
Glass
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Solution
Copper is known for its excellent thermal conductivity, making it the best conductor among the given options.
Correct Answer: C — Copper
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Q. Which of the following materials is typically a good conductor of electricity?
A.
Rubber
B.
Copper
C.
Glass
D.
Wood
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Solution
Copper is a good conductor of electricity, while rubber, glass, and wood are insulators.
Correct Answer: B — Copper
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Q. Which of the following materials transmits sound the fastest?
A.
Air
B.
Water
C.
Steel
D.
Wood
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Solution
Sound travels fastest in solids like steel due to closely packed molecules.
Correct Answer: C — Steel
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Q. Which of the following materials typically has the highest Young's modulus?
A.
Rubber
B.
Steel
C.
Wood
D.
Plastic
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Solution
Steel typically has a much higher Young's modulus compared to rubber, wood, and plastic.
Correct Answer: B — Steel
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Q. Which of the following materials would have the highest Young's modulus?
A.
Rubber
B.
Steel
C.
Wood
D.
Plastic
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Solution
Steel has a much higher Young's modulus compared to rubber, wood, and plastic, indicating it is much stiffer.
Correct Answer: B — Steel
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Q. Which of the following numbers has 4 significant figures?
A.
0.0025
B.
2500
C.
25.00
D.
0.02500
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Solution
25.00 has 4 significant figures due to the trailing zeros after the decimal.
Correct Answer: C — 25.00
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Q. Which of the following numbers has the least number of significant figures?
A.
0.00345
B.
12.30
C.
100
D.
0.0456
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Solution
The number 100 has only 1 significant figure unless specified otherwise.
Correct Answer: C — 100
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Q. Which of the following numbers has the least significant figures?
A.
0.00560
B.
0.0560
C.
0.560
D.
5.60
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Solution
0.00560 has 3 significant figures, 0.0560 has 3 significant figures, 0.560 has 3 significant figures, and 5.60 has 3 significant figures. However, 0.00560 is the smallest number, but all have the same count of significant figures.
Correct Answer: A — 0.00560
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Q. Which of the following numbers has the most significant figures?
A.
0.00789
B.
7890
C.
7.890 x 10^3
D.
0.07890
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Solution
7.890 x 10^3 has 4 significant figures, while the others have 3, 3, and 4 respectively, but the leading zeros in the first and last options do not count.
Correct Answer: C — 7.890 x 10^3
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Q. Which of the following numbers has three significant figures?
A.
0.00456
B.
123.4
C.
1001
D.
0.0300
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Solution
0.0300 has three significant figures (the zeros after the 3 are significant because they come after a decimal point).
Correct Answer: D — 0.0300
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Q. Which of the following operations will yield a result with the least number of significant figures?
A.
5.00 + 2.0
B.
3.00 x 4.0
C.
6.0 / 2.00
D.
1.5 - 0.50
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Solution
In the operation 3.00 x 4.0, 3.00 has three significant figures and 4.0 has two. The result will have two significant figures, which is the least among the options.
Correct Answer: B — 3.00 x 4.0
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Q. Which of the following orbitals is the highest in energy?
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Solution
The 3d orbital is higher in energy than the 4s orbital due to its shape and electron repulsion.
Correct Answer: D — 3d
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Q. Which of the following orbits allows a satellite to cover the entire surface of the Earth over time?
A.
Geostationary orbit
B.
Polar orbit
C.
Circular orbit
D.
Elliptical orbit
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Solution
A polar orbit allows a satellite to pass over the entire surface of the Earth as the Earth rotates beneath it.
Correct Answer: B — Polar orbit
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Q. Which of the following orbits is used for weather satellites?
A.
Geostationary orbit
B.
Polar orbit
C.
Elliptical orbit
D.
Low Earth orbit
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Solution
Weather satellites typically use polar orbits to cover the entire surface of the Earth as the planet rotates beneath them.
Correct Answer: B — Polar orbit
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Q. Which of the following particles has a negative charge?
A.
Proton
B.
Neutron
C.
Electron
D.
Positron
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Solution
The electron is the only particle listed that has a negative charge.
Correct Answer: C — Electron
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Q. Which of the following particles has the least mass?
A.
Proton
B.
Neutron
C.
Electron
D.
Alpha particle
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Solution
The electron has the least mass compared to protons and neutrons.
Correct Answer: C — Electron
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Q. Which of the following particles has the smallest mass?
A.
Proton
B.
Neutron
C.
Electron
D.
Alpha particle
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Solution
Among the given particles, the electron has the smallest mass, approximately 1/1836 of a proton.
Correct Answer: C — Electron
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Q. Which of the following particles is emitted during beta decay?
A.
Alpha particle
B.
Beta particle
C.
Gamma ray
D.
Neutron
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Solution
Beta decay involves the emission of beta particles, which are electrons or positrons.
Correct Answer: B — Beta particle
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Q. Which of the following particles is not a baryon?
A.
Proton
B.
Neutron
C.
Pion
D.
Lambda particle
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Solution
Pions are mesons, not baryons. Baryons are particles made up of three quarks, while mesons are made up of a quark and an antiquark.
Correct Answer: C — Pion
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Q. Which of the following particles is not a constituent of the nucleus?
A.
Proton
B.
Neutron
C.
Electron
D.
Alpha particle
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Solution
Electrons are not constituents of the nucleus; they orbit around the nucleus, while protons and neutrons are found within it.
Correct Answer: C — Electron
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Q. Which of the following particles is not a nucleon?
A.
Proton
B.
Neutron
C.
Electron
D.
Alpha particle
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Solution
An electron is not a nucleon; nucleons are particles found in the nucleus, which include protons and neutrons.
Correct Answer: C — Electron
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