NEET 2013 Question Paper

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

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

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 :-

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is :-