Question
Optical fibres are related with(a) Communication (b) Light(c) Computer(d) None of these
✓
Answer
(d) None of these
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A capacitor is kept connected to the battery and a dielectric slab is inserted between the plates. During this process(a) No work is done(b) Work is done at the cost of the energy already stored in the capacitor before the slab is inserted(c) Work is done at the cost of the battery(d) Work is done at the cost of both the capacitor and the battery
If a proton and electron have same de Broglie wavelength, then:
Mark out the correct options.
- Diamagnetism occurs in all materials.
- Diamagnetism results from the partial alignment of permanent magnetic moment.
- The magnetizing field intensity H is always zero in free space.
- The magnetic field of induced magnetic moment is opposite to the applied field.
This symbol represents
The resistance of a germanium junction diode whose $V - I$ is shown in figure is $\left(v_{k}=0.3 v\right)$
→The resistivity of ‘X’ decreases with temperature and its coefficient of resistivity is negative. Identify X.
The two ends of a spring are displaced along the length of the spring. All displacement have equal magnitudes. In which case or cases the tension or compression in the spring will have a maximum magnitude?
- The right end is displaced towards right and the left end towards left.
- Both ends are displaced towards right.
- Both ends are displaced towards left.
- The right end is displaced towards left and the left end towards right.
The value of Curie temperature for Ni is nearly:
The electric field in a region is directed outward and is proportional to the distance $r$ from the origin. Taking the electric potential at the origin to be zero,
→If 96500 coulombs of electricity liberates one gram equivalent of any substance, the time taken for a current of 0.15 amperes to deposite 20mg of copper from a solution of copper sulphate is (Chemical equivalent of copper = 32)(a) 5 min 20 sec(b) 6 min 42 sec(c) 4 min 40 sec(d) 5 min 50 sec