MCQ
Lenz’s law applies to
  • A
    Electrostatics
  • B
    Lenses
  • Electro-magnetic induction
  • D
    Cinema slides

Answer

Correct option: C.
Electro-magnetic induction
c
It states that the direction of induced current is always such as to oppose the change in the circuit or the magnetic field that produces it.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Consider a ray of light incident from air onto a slab of glass $($refractive index $n)$ of width $d$, at an angle $\theta $. The phase difference between the ray reflected by the top surface of the glass and the bottom surface is:
Four different independent waves are represented by $(i)$ ${y_1} = {a_1}\sin \omega t$ $(ii)$ ${y_2} = {a_2}\sin 2\,\omega t$ $(iii)$ ${y_3} = {a_3}\cos \omega t$ $(iv)$ ${y_4} = {a_4}\sin \left( {\omega t + \frac{\pi }{3}} \right)$ With which two waves interference is possible
If 20 gm of a radioactive substance due to radioactive decay reduces to 10 gm in 4 minutes, then in what time 80 gm of the same substance will reduce to 10 gm
A cut diamond sparkles because of its
The activity of a sample is $ 64 \times 10^{-5}\ Ci$ . Its half-life $3$ days. The activity will become$5 \times {10^{ - 6}}\ Ci$ after ........... $days$
A thin, metallic spherical shell contains a charge $Q$ on it. A point charge q is placed at the centre of the shell and another charge $q_1$ is placed outside it as shown in figure. All the three charges are positive. The force on the charge at the centre is: 
The-relation between the magnetic susceptibility and the magnetic permeability is
A wire 100 cm long and 2.0 mm diameter has a resistance of 0.7 ohm, the electrical resistivity of the material is
Three identical uncharged metal spheres are at the vertices of an equilateral triangle. One at a time, a small sphere is connected by a conducting wire with a large metal sphere that is charged. The center of the large sphere is in the straight line perpendicular to the plane of equilateral triangle and passing through its centre (see figure). As a result, the first small sphere acquires charge $q_1$ and second charge $q_2 (q_2 < q_1)$ . The charge that the third sphere $q_3$ will acquire is (Assume $l >> R$ , $l >> r$ , $d >> R$ , $d >> r$ )
The atomic number of silicon is $14$. Its ground state electron configuration is