Q. In 2021, which country successfully tested a new magnetic propulsion system for spacecraft?
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A.
United States
-
B.
China
-
C.
India
-
D.
Russia
Solution
China successfully tested a new magnetic propulsion system for spacecraft in 2021.
Correct Answer:
B
— China
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Q. In 2021, which scientist was awarded the Nobel Prize for their work related to magnetic materials?
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A.
Albert Einstein
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B.
Klaus Hasselmann
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C.
Syukuro Manabe
-
D.
Giorgio Parisi
Solution
Giorgio Parisi was awarded the Nobel Prize in Physics in 2021 for his work on complex systems, including magnetic materials.
Correct Answer:
D
— Giorgio Parisi
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Q. In 2022, which country announced a new initiative to develop magnetic levitation technology for trains?
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A.
Japan
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B.
Germany
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C.
France
-
D.
India
Solution
Japan announced a new initiative in 2022 to develop magnetic levitation technology for trains.
Correct Answer:
A
— Japan
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Q. What is the effect called when a current-carrying conductor is placed in a magnetic field?
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A.
Lorentz force
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B.
Coulomb force
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C.
Gravitational force
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D.
Frictional force
Solution
The effect is called the Lorentz force when a current-carrying conductor is placed in a magnetic field.
Correct Answer:
A
— Lorentz force
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Q. What is the primary principle behind the operation of a transformer?
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A.
Electrolysis
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B.
Magnetic induction
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C.
Thermal conduction
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D.
Capacitance
Solution
The primary principle behind the operation of a transformer is magnetic induction.
Correct Answer:
B
— Magnetic induction
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Q. What phenomenon is described by the magnetic effects of electric current?
-
A.
Electromagnetism
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B.
Thermodynamics
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C.
Optics
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D.
Quantum Mechanics
Solution
Electromagnetism describes the magnetic effects of electric current.
Correct Answer:
A
— Electromagnetism
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Q. Which country launched a satellite to study the magnetic field of Earth in 2022?
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A.
India
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B.
United States
-
C.
China
-
D.
Russia
Solution
China launched the satellite 'Swarm' in 2022 to study Earth's magnetic field.
Correct Answer:
C
— China
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Q. Which device uses the magnetic effects of electric current to operate?
-
A.
Transistor
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B.
Inductor
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C.
Electric motor
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D.
Resistor
Solution
An electric motor operates using the magnetic effects of electric current.
Correct Answer:
C
— Electric motor
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Q. Which law describes the relationship between electric current and magnetic fields?
-
A.
Ohm's Law
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B.
Faraday's Law
-
C.
Ampère's Law
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D.
Newton's Law
Solution
Ampère's Law describes the relationship between electric current and magnetic fields.
Correct Answer:
C
— Ampère's Law
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