A short sighted person can see distinctly only those objects which lie between 10 cm and 100 cm from him. The power of the spectacle lens required to see a distant object is
|
(a) + 0.5 D |
(b) – 1.0 D |
(c) – 10 D |
(d) + 4.0 D |
(b) – 1.0 D
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The distance between the two charges +q and -q of a dipole is r. On the axial line at a distance d from the centre of dipole, the intensity is proportional to
|
(a) |
(b) |
(c) |
(d) |
A transformer has turn ratio 100/1. If secondary coil has 4 amp current then current in primary coil is
|
(a) 4 A |
(b) 0.04 A |
(c) 0.4 A |
(d) 400 A |
Energy of electron in a orbit of H-atom is
|
(a) Positive |
(b) Negative |
(c) Zero |
(d) Nothing can be said |
The work function of a metallic surface is 5.01 eV. The photo-electrons are emitted when light of wavelength 2000Å falls on it. The potential difference applied to stop the fastest photo-electrons is [h = 4.14 
|
(a) 1.2 volts |
(b) 2.24 volts |
(c) 3.6 volts |
(d) 4.8 volts |
When light travels from glass to air, the incident angle is 
and the refracted angle is 
. The true relation is
|
(a) |
(b) |
(c) |
(d) Not predictable |
A cell of e.m.f 1.5 V having a finite internal resistance is connected to a load resistance of 2Ω. For maximum power transfer the internal resistance of the cell should be
|
(a) 4 ohm |
(b) 0.5 ohm |
(c) 2 ohm |
(d) None of these |
