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@www.ignou.ac.in BPSE 144 Important Questions with Answers PDF

IGNOU BPSE 144 December 2025 Important Questions | BPSE 144 Important Questions and Answers With PDF

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Two small identical metallic balls having charges q and -2q are kept far at a separation r. They are brought in contact and then separated at distance r/2. Compared to the initial force F, they will now :

Q) A light of frequency v is incident on a metal surface whose work function is Wo. The kinetic energy of the emitted electron is K. If the frequency of the incident light is doubled, then the Kinetic Energy of the emitted electron will be?

In a Young’s double-slit experiment, the fringe width is found to be ẞ. If the entire apparatus is immersed in a liquid of refractive index µ, the new fringe width will be?

Q3. Corrective exercises should be done under a _____ advice and supervision.

A cylinder of radius r is surmounted on a hemisphere of same radius. If total height of the object is 13 cm, then its inner surface area is

nth term of the A.P.: – 1/3, 4/3, 3 ,… is

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