Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance between E and F is

The total power drawn from the cell in the circuit above is

A beam of radiation is passed between a pair of charged plates as indicated in the fig above. Beam P is undetected While Q is deflected to the left. P and Q respectively should be

I.γ-rays β-rays
II. x-rays β-rays
III. γ-rays x-rays
IV. x-rays x-rays