This question tests the basic understanding of how magnetic materials behave when exposed to an external magnetic field. The key concept here is magnetism and the alignment of magnetic domains within a material.
Correct Option: B) It becomes magnetized
The question asks for the unit of magnetic flux. To answer this, we need to recall the definitions and standard units of various electromagnetic quantities.
B) Weber is the SI unit of magnetic flux.
The question asks to identify the device that converts mechanical energy into electrical energy using magnets. This process is fundamental to how electricity is generated.
Correct Option: C) A Generator is a device that converts mechanical energy into electrical energy. It operates on the principle of electromagnetic induction, where the relative motion between a conductor and a magnetic field induces an electric current.
The question asks for an instrument commonly used to detect the presence of a magnetic field. We need to evaluate each option based on its primary function.
Correct Option: D) A compass is an instrument containing a magnetized needle that aligns itself with the direction of the magnetic field it is placed in. This makes it ideal for detecting the presence and direction of a magnetic field.
The question asks to identify the true statement about magnetic field lines from the given options. We need to recall the fundamental properties of magnetic field lines.
Based on the analysis, the statement that magnetic field lines form closed loops is the correct property.
B) They form closed loops — Magnetic field lines are continuous and form closed loops, extending from the North pole to the South pole outside the magnet and from the South pole to the North pole inside the magnet.
The question asks for the term that describes the region around a magnet where its magnetic force can be experienced. We need to identify the correct scientific term from the given options.
Correct Option: B) Magnetic field is the region around a magnet or a current-carrying conductor where its magnetic force can be experienced.