Physics Syllabus (JEE Main)
Q. Which logic gate is equivalent to an AND gate followed by a NOT gate?
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A.
OR
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B.
NAND
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C.
NOR
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D.
XOR
Solution
The NAND gate is equivalent to an AND gate followed by a NOT gate, as it inverts the output of the AND gate.
Correct Answer: B — NAND
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Q. Which logic gate is represented by the symbol '⊕'?
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A.
AND Gate
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B.
OR Gate
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C.
NAND Gate
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D.
XOR Gate
Solution
The symbol '⊕' represents the XOR gate.
Correct Answer: D — XOR Gate
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Q. Which logic gate outputs true only when all inputs are false?
-
A.
AND
-
B.
OR
-
C.
NOR
-
D.
NAND
Solution
The NOR gate outputs true (1) only when all inputs are false (0).
Correct Answer: C — NOR
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Q. Which logic gate outputs true only when all inputs are true?
-
A.
AND
-
B.
OR
-
C.
NOT
-
D.
NAND
Solution
The AND gate outputs true only when all its inputs are true.
Correct Answer: A — AND
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Q. Which logic gate outputs true only when all its inputs are true?
-
A.
AND Gate
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B.
OR Gate
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C.
NOT Gate
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D.
NAND Gate
Solution
The AND gate outputs true only when all its inputs are true.
Correct Answer: A — AND Gate
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Q. Which logic gate outputs true only when both inputs are false?
-
A.
AND
-
B.
OR
-
C.
NAND
-
D.
NOR
Solution
The NOR gate outputs true only when both inputs are false.
Correct Answer: D — NOR
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Q. Which material has the highest resistivity?
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A.
Copper
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B.
Aluminum
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C.
Iron
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D.
Rubber
Solution
Rubber has a much higher resistivity compared to metals like copper, aluminum, and iron.
Correct Answer: D — Rubber
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Q. Which material has the lowest resistivity?
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A.
Copper
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B.
Aluminum
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C.
Silver
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D.
Iron
Solution
Silver has the lowest resistivity among common materials.
Correct Answer: C — Silver
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Q. Which modulation technique is most commonly used in digital communication systems?
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A.
Amplitude Modulation (AM)
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B.
Frequency Modulation (FM)
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C.
Phase Shift Keying (PSK)
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D.
Quadrature Amplitude Modulation (QAM)
Solution
Quadrature Amplitude Modulation (QAM) is widely used in digital communication systems due to its efficiency in transmitting data.
Correct Answer: D — Quadrature Amplitude Modulation (QAM)
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Q. Which modulation technique is most commonly used in FM radio broadcasting?
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A.
Amplitude Modulation
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B.
Frequency Modulation
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C.
Phase Modulation
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D.
Pulse Code Modulation
Solution
Frequency Modulation (FM) is the standard technique used in FM radio broadcasting due to its resistance to noise.
Correct Answer: B — Frequency Modulation
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Q. Which modulation technique is most commonly used in television broadcasting?
-
A.
Amplitude Modulation (AM)
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B.
Frequency Modulation (FM)
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C.
Phase Modulation (PM)
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D.
Pulse Code Modulation (PCM)
Solution
Frequency Modulation (FM) is commonly used in television broadcasting due to its better noise immunity.
Correct Answer: B — Frequency Modulation (FM)
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Q. Which modulation technique is used to transmit digital data over an analog channel?
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A.
AM
-
B.
FM
-
C.
PSK
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D.
ASK
Solution
Phase Shift Keying (PSK) is a modulation technique used to transmit digital data over an analog channel.
Correct Answer: C — PSK
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Q. Which modulation technique varies the amplitude of the carrier signal?
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A.
Frequency Modulation
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B.
Amplitude Modulation
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C.
Phase Modulation
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D.
Pulse Modulation
Solution
Amplitude Modulation (AM) varies the amplitude of the carrier signal.
Correct Answer: B — Amplitude Modulation
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Q. Which of the following assumptions is NOT part of the kinetic theory of gases?
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A.
Gas molecules are in constant random motion
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B.
Gas molecules have negligible volume compared to the container
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C.
Gas molecules experience intermolecular forces
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D.
Collisions between gas molecules are perfectly elastic
Solution
The kinetic theory of gases assumes that gas molecules do not experience intermolecular forces, which is why option 3 is NOT part of the assumptions.
Correct Answer: C — Gas molecules experience intermolecular forces
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Q. Which of the following best describes the effect of a larger slit width on the diffraction pattern?
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A.
More pronounced diffraction
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B.
Less pronounced diffraction
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C.
No diffraction
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D.
Increased number of fringes
Solution
A larger slit width results in less pronounced diffraction, leading to a narrower central maximum.
Correct Answer: B — Less pronounced diffraction
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Q. Which of the following best describes the term 'angular width' of a diffraction maximum?
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A.
The distance between two adjacent maxima
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B.
The angle subtended by the maximum at the source
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C.
The width of the maximum on a screen
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D.
The angle between the first minimum and the central maximum
Solution
The angular width of a diffraction maximum is defined as the angle between the first minimum on either side of the central maximum.
Correct Answer: D — The angle between the first minimum and the central maximum
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Q. Which of the following best describes the term 'elastic limit'?
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A.
Maximum stress a material can withstand
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B.
Point of permanent deformation
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C.
Point of maximum strain
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D.
Point of fracture
Solution
The elastic limit is the maximum stress that a material can withstand without undergoing permanent deformation.
Correct Answer: A — Maximum stress a material can withstand
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Q. Which of the following best describes the term 'shear modulus'?
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A.
Ratio of shear stress to shear strain
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B.
Ratio of tensile stress to tensile strain
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C.
Ratio of compressive stress to compressive strain
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D.
Ratio of bulk stress to bulk strain
Solution
The shear modulus is defined as the ratio of shear stress to shear strain in a material.
Correct Answer: A — Ratio of shear stress to shear strain
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Q. Which of the following colors of light has the shortest wavelength?
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A.
Red
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B.
Green
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C.
Blue
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D.
Violet
Solution
Violet light has the shortest wavelength among the visible spectrum.
Correct Answer: D — Violet
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Q. Which of the following conditions is necessary for total internal reflection to occur?
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A.
Light must travel from a denser to a rarer medium
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B.
Light must travel from a rarer to a denser medium
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C.
The angle of incidence must be less than the critical angle
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D.
The angle of incidence must be equal to the critical angle
Solution
Total internal reflection occurs only when light travels from a denser medium to a rarer medium and the angle of incidence exceeds the critical angle.
Correct Answer: A — Light must travel from a denser to a rarer medium
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Q. Which of the following conditions must be satisfied for total internal reflection to occur?
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A.
Light must travel from a denser to a rarer medium.
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B.
Light must travel from a rarer to a denser medium.
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C.
The angle of incidence must be less than the critical angle.
-
D.
The angle of incidence must be equal to the critical angle.
Solution
Total internal reflection occurs when light travels from a denser medium to a rarer medium and the angle of incidence exceeds the critical angle.
Correct Answer: A — Light must travel from a denser to a rarer medium.
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Q. Which of the following configurations can be analyzed using Ampere's Law?
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A.
A point charge
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B.
A charged capacitor
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C.
A long straight wire
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D.
A dipole
Solution
Ampere's Law is applicable to configurations with symmetry, such as a long straight wire carrying current.
Correct Answer: C — A long straight wire
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Q. Which of the following configurations can be used to create a Wheatstone bridge?
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A.
Series only
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B.
Parallel only
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C.
Series and parallel
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D.
None of the above
Solution
A Wheatstone bridge can be formed using a combination of series and parallel resistors.
Correct Answer: C — Series and parallel
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Q. Which of the following configurations will produce a magnetic field that is uniform in space?
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A.
A long straight wire
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B.
A circular loop of wire
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C.
Two parallel wires carrying current in the same direction
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D.
A solenoid
Solution
A solenoid produces a uniform magnetic field in its interior, as described by the Biot-Savart Law.
Correct Answer: D — A solenoid
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Q. Which of the following configurations will produce a uniform magnetic field using the Biot-Savart Law?
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A.
A straight wire
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B.
A circular loop
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C.
A solenoid
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D.
A single current element
Solution
A solenoid produces a uniform magnetic field inside it, as described by the Biot-Savart Law.
Correct Answer: C — A solenoid
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Q. Which of the following configurations will produce the strongest magnetic field at the center?
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A.
A single straight wire
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B.
A circular loop of wire
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C.
A solenoid
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D.
A toroid
Solution
A toroid produces the strongest magnetic field at its center due to the closed loop configuration of the wire.
Correct Answer: D — A toroid
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Q. Which of the following correctly describes gravitational field lines?
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A.
They point away from the mass.
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B.
They are always straight lines.
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C.
They never intersect.
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D.
They can be closed loops.
Solution
Gravitational field lines never intersect because it would imply two different gravitational forces acting on the same point.
Correct Answer: C — They never intersect.
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Q. Which of the following correctly describes gravitational potential energy?
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A.
It is a scalar quantity.
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B.
It is a vector quantity.
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C.
It can be negative.
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D.
Both A and C.
Solution
Gravitational potential energy is a scalar quantity and can be negative when the object is within the gravitational field of another mass.
Correct Answer: D — Both A and C.
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Q. Which of the following correctly describes the gravitational field strength at a distance r from a mass M?
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A.
g = GM/r
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B.
g = GM/r²
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C.
g = Gm/r²
-
D.
g = Gm/r
Solution
The gravitational field strength (g) at a distance r from a mass M is given by g = GM/r².
Correct Answer: B — g = GM/r²
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Q. Which of the following correctly describes the gravitational force between two objects?
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A.
It depends on the medium between them
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B.
It is independent of the distance between them
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C.
It is proportional to the product of their masses
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D.
It can be shielded by other masses
Solution
The gravitational force is proportional to the product of the masses of the two objects.
Correct Answer: C — It is proportional to the product of their masses
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