Physics Test 98...

The electric field line pattern for charges +2q & –q are shown. Select the most appropriate diagram :-

In half deflection method, the resistance of resistance box in series with the galvanometer is 10,000 Ω. When the galvanometer is shunted with 10 Ω resistance, its reading drops to half the initial value. The resistance of galvanometer is :-

Two air filled capacitors are connected as shown. The left capacitor is suddenly filled with a dielectric of constant K. The work done by battery after that is 24µJ. Dielectric constant K is :-

An infinite cylindrical current carrying wire carries a current that is uniformly distributed over its cross section. The magnetic field as a function of distance from it's axis is :-

A metal sheet is being pulled out of a region of magnetic field. If the sheet is non magnetic  :-

A signal containing multiple frequencies is shown in figure A. It is passed through 2 different filters and then outputs are shown in figure B & C.

The sketch shown below illustrates the apparatus and results for a famous experiment. The graph on the right is a polar plot of the number of electrons received in the detector. From the result, the experimenters were able to conclude that :-

Mass of Bromine, Selenium and Krypton are given as :-

M⁸⁰_Br = 79.918528 u, M(⁸⁰Kr) = 79.916376 u, M(⁸⁰Se) = 79.916521u

Which of the following β decays are possible?

Drawing power from a 12V car battery, a 9V stabilized DC voltage is required to power a car stereo system, attached to the terminals A and B, as shown in the figure. If a Zener diode with ratings, V_z = 9V and P_max = 0.27 W, is connected as shown in the figure, for the above purpose, the minimum series resistance R_S must be :-

When light of wavelength 540 nm passes through a single slit of unknown width, the diffraction pattern displays a second maximum where the first minimum of light of an unknown wavelength had been observed to fall. What is the unknown wavelength ?