NEET 2013

For photoelectric emission from certain metal the cutoff frequencyis v. If radiation of frequency 2 v impinges on the metalplate, the maximum possible velocity of the emitted electron will be (m is the electron mass) :

During an adiabatic process, the pressure of a gasis found to be proportional to the cube of its temperature.The ratio of $$\frac{C_{p}}{C_{v}}$$.The ratio of $$\frac{C_{p}}{C_{v}}$$ of the gas is

The following four wires are made of the same material. Which of these will have the largest extension when the sametension is applied ?

The resistances of the four arms P,Q, R and S in a Wheatstone’s bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm,respectively. The e.m.f. and internal resistance of the cell are 7 Volt and 5 ohm respectively. If the galvanometerresistance is 50 ohm, the current drawnfromthecell will be :

The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from $$T_{1} K$$ to $$T_{2} K$$ is:

A piece of iron is heated in a flame.It first becomes dull red then becomes redissh yellow and finally turns to white hot.The correct explanation for the above observation is possible by using :

A gas is taken through the cycle $$A \rightarrow B \rightarrow C \rightarrow A$$ as shown. What is the net work done by the gas ?

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

An explosion breaks a rock into three parts in a horizontal plane. Twoof themgooff at right angles to each other. Thefirst part of mass 1 kg moves with a speed of 12 $$ms^{-1}$$ and the secondpart of mass 2 kgmoves with 8 $$ms^{-1}$$ speed. If the thirdpart flies off with 4 $$ms^{-1}$$ speed, then its mass is :

In an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%,3% and 4% respectively. Quantity P is calculated as follows;
$$P=\frac{a^{3}b^{2}}{cd}$$ % error in P is: