Explanation:
During discharging of a cell terminal potential difference, the terminal potential difference is lesser than the emf of the cell. The direction of current inside the cell is from negative terminal to positive terminal.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The formula for induced e.m.f. in a coil due to change in magnetic flux through the coil is (here A = area of the coil, B = magnetic field)
|
(a) e = - A. |
(b) e = -B. |
(c) e = - |
(d) e = - |
An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively
|
(a) 2q.E and minimum |
(b) q.E and p.E |
(c) Zero and minimum |
(d) q.E and maximum |
The binding energy per nucleon of deuterium and helium atom is 1.1 MeV and 7.0 MeV. If two deuterium nuclei fuse to form helium atom, the energy released is
|
(a) 19.2 MeV |
(b) 23.6 MeV |
(c) 26.9 MeV |
(d) 13.9 MeV |
The reading of a high resistance voltmeter when a cell is connected across it is 2.2 V. When the terminals of the cell are also connected to a resistance of 5Ω the voltmeter reading drops to 1.8 V. Find the internal resistance of the cell
|
(a) 1.2 Ω |
(b) 1.3 Ω |
(c) 1.1 Ω |
(d) 1.4 Ω |
