OJEE 2026 May 5 Shift 3 B.Pharm Question Paper with Solutions

Which one of the following statements is wrong?

• (a) Golden algae are also called desmids
• (b) Eubacteria are also called false bacteria
• (c) Phycomycetes are also called algal fungi
• (d) Cyanobacteria are also called blue-green algae

Methanogens belong to

• (a) eubacteria
• (b) archaebacteria
• (c) dinoflagellates
• (d) slime moulds

Chromatophores take part in

• (a) photosynthesis
• (b) growth
• (c) movement
• (d) respiration

Archaebacteria differ from eubacteria in

• (a) cell membrane structure
• (b) mode of nutrition
• (c) cell shape
• (d) mode of reproduction

Besides paddy fields, cyanobacteria are also found inside vegetative part of

• (a) Pinus
• (b) Cycas
• (c) Equisetum
• (d) Psilotum

Two identical conducting spheres, one carrying a charge of +4q and the other carrying -2q, are kept at a distance r apart in a vacuum. The magnitude of the electrostatic force between them is F. If they are brought into contact and then separated to the same distance r, what is the new electrostatic force between them?

• (A) F/8
• (B) F/4
• (C) F
• (D) F/2

A charge Q is placed at the center of an uncharged, hollow, conducting spherical shell. What is the electric field at a point outside the shell at a distance r from the center, and what is the net charge on the outer surface of the shell?

• (A) E = 0, Net charge = 0
• (B) E = (1/4\(\pi\epsilon_0\))(Q/r\(^2\)), Net charge = +Q
• (C) E = (1/4\(\pi\epsilon_0\))(Q/r\(^2\)), Net charge = 0
• (D) E = 0, Net charge = +Q

Five equal point charges, each +q, are placed at five of the six vertices of a regular hexagon of side length a. What is the magnitude of the electric field at the center of the hexagon?

• (A) kq/a\(^2\)
• (B) 2kq/a\(^2\)
• (C) 0
• (D) kq/2a\(^2\)

A simple pendulum has a bob of mass m carrying a positive charge q. It is placed in a region where a uniform electric field E is directed vertically upwards. If the string is displaced slightly and released, what happens to its time period T compared to its time period T\(_0\) without the electric field?

• (A) T \textgreater T\(_0\)
• (B) T \textless T\(_0\)
• (C) T = T\(_0\)
• (D) The pendulum will not oscillate

A point charge +q is placed precisely at the center of one of the faces of a perfectly symmetrical cube. What is the total electric flux passing through the cube?

• (A) q/6\(\epsilon_0\)
• (B) q/2\(\epsilon_0\)
• (C) q/\(\epsilon_0\)
• (D) q/3\(\epsilon_0\)