NEET 2013 Question Paper

The wavelength λe of an electron and λp of a photon of same energy E are related by:

Ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen spectrum is:-

A coil is self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when :

The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 Ω is

The resistances of the four arms P,Q, R and S ina Wheatstone′s bridge are 10 ohm, 30 ohm, 30 ohmand 90 ohm, respectively. The e.m.f. and internalresistance of the cell are 7 volt and 5 ohmrespectively. If the galvanometer resistance is50 ohm, the current drawn from the cell will be :-