Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Work done by an external agent in separating the parallel plate capacitor is
|
(a) CV |
(b) |
(c) |
(d) None of these |
A circular coil of radius 4 cm and of 20 turns carries a current of 3 amperes. It is placed in a magnetic field of intensity of 0.5 
. The magnetic dipole moment of the coil is
|
(a) 0.15 |
(b) 0.3 |
(c) 0.45 
|
(d) 0.6
|
The current flowing in a copper voltameter is 1.6 A. The number of 
ions deposited at the cathode per minute are
|
(a) 1.5 |
(b) 3 |
(c) 6 |
(d) 1 |
In a photocell bichromatic light of wavelength 2475 Å and 6000 Å are incident on cathode whose work function is 4.8 eV. If a uniform magnetic field of 3 × 10–5 Tesla exists parallel to the plate, the radius of the path describe by the photoelectron will be (mass of electron = 9 × 10–31 kg)
|
(a) 1 cm |
(b) 5 cm |
(c) 10 cm |
(d) 25 cm |
For a cell, the graph between the potential difference (V) across the terminals of the cell and the current (I) drawn from the cell is shown in the figure. The e.m.f. and the internal resistance of the cell are
|
(a) 2V, 0.5Ω |
(b) 2V, 0.4 Ω |
(c) >2V, 0.5 Ω |
(d) > 2V, 0.4 Ω |
The process of superimposing signal frequency (i.e. audio wave) on the carrier wave is known as
|
(a) Transmission |
(b) Reception |
(c) Modulation |
(d) Detection |
