NEET 2013
For the following questions answer them individually
Ratio of longest wave lengths corresponding to Lymanand Balmerseries in hydrogen spectrum is :
A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a mass less string tied to point Q as shown in figure. When string is cut, the initial angular acceleration of the rod is :
A wire of resistance 4 2 is stretched to twice its original length. The resistance of stretched wire would be:
The velocity of a projectile at the intial point A is $$(2 \hat{i}+3\hat{j})$$ $$\frac{m}{s}$$.Its velocity (in $$\frac{m}{s}$$) at the point B is.
A body of mass m is taken from the earth surface to the height equal to twice the radius (R) of the earth .The change in potential energy of the body will be
A stone falls freely under gravity.It covers distances $$h_{1},h_{2},h_{3}$$ in the first five seconds ,the next five seconds and the next 5 seconds respectively .The relation between $$h_{1},h_{2}$$ and $$h_{3}$$ is:
A bar magnet of length ‘l’ and magnetic dipole moment ’M’ is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be :
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 Ω is:
