- ANatural magnet.
- BArtificial magnet.
- CNeither natural nor artificial.
- DNone of these options.
Explanation:
Artificial magnets are man-made magnets. Magnets that are made from iron in different components shapes and sizes for different uses are called artificial magnets.
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A thin lens made of glass of refractive index 1.5 has a front surface + 11 D power and back surface – 6 D. If this lens is submerged in a liquid of refractive index 1.6, the resulting power of the lens is
|
(a) – 0.5 D |
(b) + 0.5 D |
(c) – 0.625 D |
(d) + 0.625 D |
When a wave travels from one medium to another, the quantity which will not change is its:
Magnetic flux in a circuit containing a coil of resistance 2Ω changes from 2.0 Wb to 10 Wb in 0.2 sec. The charge passed through the coil in this time is
|
(a) 0.8 C |
(b) 1.0 C |
(c) 5.0 C |
(d) 4.0 C |