Physics Syllabus (JEE Main)
Q. Which of the following factors does NOT affect the magnetic field produced by a current element according to the Biot-Savart Law?
A.
Magnitude of the current
B.
Length of the current element
C.
Distance from the current element
D.
Temperature of the conductor
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Solution
The temperature of the conductor does not affect the magnetic field produced by a current element according to the Biot-Savart Law.
Correct Answer: D — Temperature of the conductor
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Q. Which of the following factors does NOT affect the magnetic field produced by a straight current-carrying conductor?
A.
Current strength
B.
Distance from the conductor
C.
Length of the conductor
D.
Angle of observation
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Solution
The length of the conductor does not affect the magnetic field produced by a straight current-carrying conductor at a given point.
Correct Answer: C — Length of the conductor
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Q. Which of the following factors does NOT affect the magnetic field produced by a current-carrying wire according to the Biot-Savart Law?
A.
Distance from the wire
B.
Magnitude of the current
C.
Shape of the wire
D.
Angle between the current element and the point
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Solution
The shape of the wire does not directly affect the magnetic field produced by a current-carrying wire according to the Biot-Savart Law.
Correct Answer: C — Shape of the wire
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Q. Which of the following factors does NOT affect the magnetic field produced by a current-carrying wire?
A.
The amount of current
B.
The distance from the wire
C.
The material of the wire
D.
The angle between the wire and the point of interest
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Solution
The material of the wire does not affect the magnetic field produced by a current-carrying wire according to the Biot-Savart Law.
Correct Answer: C — The material of the wire
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Q. Which of the following factors does NOT affect the orbital period of a satellite?
A.
Mass of the satellite
B.
Height of the orbit
C.
Mass of the Earth
D.
Gravitational constant
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Solution
The mass of the satellite does not affect the orbital period; it is determined by the height of the orbit and the mass of the Earth.
Correct Answer: A — Mass of the satellite
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Q. Which of the following factors does NOT affect the orbital speed of a satellite?
A.
Mass of the satellite
B.
Mass of the Earth
C.
Radius of the orbit
D.
Gravitational constant
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Solution
The mass of the satellite does not affect its orbital speed; it is determined by the mass of the Earth and the radius of the orbit.
Correct Answer: A — Mass of the satellite
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Q. Which of the following factors does NOT affect the rate of heat transfer by conduction?
A.
Temperature difference
B.
Material thickness
C.
Surface area
D.
Color of the material
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Solution
The color of the material does not affect the rate of heat transfer by conduction; the other factors do.
Correct Answer: D — Color of the material
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Q. Which of the following factors does NOT affect the rate of heat transfer by convection?
A.
Fluid velocity
B.
Surface area
C.
Temperature difference
D.
Material density
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Solution
Material density does not directly affect the rate of heat transfer by convection.
Correct Answer: D — Material density
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Q. Which of the following factors does NOT affect the resistivity of a material?
A.
Temperature
B.
Material type
C.
Length of the conductor
D.
Cross-sectional area
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Solution
Resistivity is a property of the material and does not depend on the length or cross-sectional area.
Correct Answer: C — Length of the conductor
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Q. Which of the following factors does NOT affect the speed of sound in a medium?
A.
Temperature
B.
Density
C.
Humidity
D.
Frequency
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Solution
The speed of sound is affected by temperature, density, and humidity, but not by frequency.
Correct Answer: D — Frequency
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Q. Which of the following factors does NOT affect the surface tension of a liquid?
A.
Temperature
B.
Impurities
C.
Density
D.
Nature of the liquid
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Solution
While temperature, impurities, and the nature of the liquid affect surface tension, density does not directly influence it.
Correct Answer: C — Density
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Q. Which of the following factors does NOT affect the torque exerted by a force?
A.
Magnitude of the force
B.
Distance from the pivot
C.
Angle of application
D.
Mass of the object
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Solution
The mass of the object does not affect the torque; torque depends on the force, distance from the pivot, and angle of application.
Correct Answer: D — Mass of the object
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Q. Which of the following factors does NOT affect the torque produced by a force?
A.
Magnitude of the force
B.
Distance from the pivot
C.
Angle of application
D.
Mass of the object
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Solution
The mass of the object does not affect the torque; torque depends on force, distance, and angle.
Correct Answer: D — Mass of the object
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Q. Which of the following factors does NOT affect the viscosity of a fluid?
A.
Temperature
B.
Pressure
C.
Density
D.
Flow rate
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Solution
Flow rate does not affect the viscosity of a fluid; viscosity is a property of the fluid itself.
Correct Answer: D — Flow rate
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Q. Which of the following fluids has the highest viscosity?
A.
Water
B.
Honey
C.
Air
D.
Olive oil
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Solution
Honey has a higher viscosity compared to water, air, and olive oil due to its thicker consistency.
Correct Answer: B — Honey
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Q. Which of the following fluids is likely to have the highest viscosity?
A.
Water
B.
Honey
C.
Air
D.
Gasoline
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Solution
Honey has a much higher viscosity compared to water, air, and gasoline.
Correct Answer: B — Honey
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Q. Which of the following gases has the highest RMS speed at the same temperature?
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
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Solution
RMS speed is inversely proportional to the square root of molar mass. Hydrogen (H2) has the lowest molar mass among the options, thus it has the highest RMS speed.
Correct Answer: C — Hydrogen (H2)
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Q. Which of the following gases will have the highest average speed at the same temperature?
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
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Solution
Hydrogen (H2) has the lowest molar mass, thus it will have the highest average speed according to the kinetic theory.
Correct Answer: C — Hydrogen (H2)
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Q. Which of the following gases will have the highest RMS speed at the same temperature?
A.
Oxygen (M = 32 g/mol)
B.
Nitrogen (M = 28 g/mol)
C.
Hydrogen (M = 2 g/mol)
D.
Carbon Dioxide (M = 44 g/mol)
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Solution
RMS speed is inversely proportional to the square root of molar mass. Hydrogen has the lowest molar mass, hence it will have the highest RMS speed.
Correct Answer: C — Hydrogen (M = 2 g/mol)
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Q. Which of the following gases will have the highest root mean square speed at the same temperature?
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Solution
The root mean square speed is inversely proportional to the square root of the molar mass. H2 has the lowest molar mass, hence it has the highest root mean square speed.
Correct Answer: C — H2
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Q. Which of the following gases would have the highest average speed at a given temperature?
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
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Solution
At a given temperature, lighter gases like hydrogen (H2) have higher average speeds compared to heavier gases like oxygen (O2) or carbon dioxide (CO2).
Correct Answer: C — Hydrogen (H2)
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Q. Which of the following gases would have the highest root mean square speed at the same temperature?
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
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Solution
Hydrogen (H2) has the lowest molar mass among the given gases, thus it will have the highest root mean square speed at the same temperature, as v_rms is inversely proportional to the square root of molar mass.
Correct Answer: C — Hydrogen (H2)
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Q. Which of the following gates is a universal gate?
A.
AND
B.
OR
C.
NAND
D.
XOR
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Solution
The NAND gate is a universal gate because it can be used to create any other gate.
Correct Answer: C — NAND
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Q. Which of the following gates is considered a universal gate?
A.
AND Gate
B.
OR Gate
C.
NAND Gate
D.
XOR Gate
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Solution
The NAND gate is considered a universal gate because it can be used to create any other gate.
Correct Answer: C — NAND Gate
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Q. Which of the following gates is equivalent to an AND gate followed by a NOT gate?
A.
OR
B.
NAND
C.
NOR
D.
XOR
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Solution
The output of an AND gate followed by a NOT gate is a NAND gate.
Correct Answer: B — NAND
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Q. Which of the following has 3 significant figures?
A.
0.00234
B.
23.40
C.
1000
D.
0.0450
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Solution
23.40 has 4 significant figures, while 0.0450 has 3.
Correct Answer: B — 23.40
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Q. Which of the following has 4 significant figures?
A.
0.0025
B.
2500
C.
25.00
D.
0.250
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Solution
25.00 has 4 significant figures due to the trailing zeros.
Correct Answer: C — 25.00
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Q. Which of the following has the least number of significant figures?
A.
0.00340
B.
0.0045
C.
0.045
D.
0.45
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Solution
0.045 has only 2 significant figures.
Correct Answer: C — 0.045
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Q. Which of the following has the smallest moment of inertia about an axis through its center?
A.
Solid cylinder
B.
Hollow cylinder
C.
Solid sphere
D.
Hollow sphere
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Solution
The solid sphere has the smallest moment of inertia compared to the other shapes for the same mass and radius.
Correct Answer: C — Solid sphere
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Q. Which of the following is a characteristic of a black body?
A.
Reflects all radiation
B.
Absorbs all radiation
C.
Transmits all radiation
D.
Scatters all radiation
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Solution
A black body is defined as an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.
Correct Answer: B — Absorbs all radiation
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