Question
Emf is most closely related to(a) Mechanical force(b) Potential difference(c) Electric field(d) Magnetic field
   
   

Answer

(b) Potential difference

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

A wave pulse, travelling on a two -piece string, gets partially reflected and partially transmitted at the junction. The reflected wave is inverted in shape as compared to the incident one. If the incident wave has wavelengt $\lambda$ and the transmitted wave $\lambda'.$
  1. $\lambda'>\lambda$
  2. $\lambda'=\lambda$
  3. $\lambda'<\lambda$
  4. Nothing can be said about the relation of $\lambda$ and $\lambda'.$
Two bodies $A$ and $B$ of equal mass are suspended from two separate massless springs of spring constant $k_1$ and $k_2$ respectively. If the bodies oscillate vertically such that their maximum velocities are equal, the ratio of the amplitude of $A$ to that of $B$ is:
The reason for shining of air bubble in water is(a) Diffraction of light(b) Dispersion of light(c) Scattering of light(d) Total internal reflection of light
   
   
Radioactive substance emits:
If a magnet is plugged into a coil, then the magnitude of induced emf does not depend upon:
If the two ends of a p-n junction are joined by a wire:
A vector $\overrightarrow{\text{A}}$ points vertically upward and $\overrightarrow{\text{B}}$ points towards north. The vector product $\overrightarrow{\text{A}}\times\overrightarrow{\text{B}}$ is:
  1. Along west.
  2. Along east.
  3. Zero.
  4. Vertically downward.
Two long parallel wires are at a distance $2d$ apart. They carry steady equal currents flowing out of the plane of the paper, as shown. The variation of the magnetic field $B$ along the line $XX\ ’$ is given by 
A gamma ray photon creates an electron- positron pair. If the rest mass energy of an electron is 0.5 MeV and the total K.E. of the electron- positron pair is 0.78 MeV, then the energy of the gamma ray photon must be(a) 0.78 MeV(b) 1.78 MeV(c) 1.28 MeV(d) 0.28 MeV
       
If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be(a) 50 Hz (b) 70.7 Hz(c) 100 Hz(d) 25 Hz