AIPMT 2011 Solved Papers
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Physics 2011
Q. 21. A current carrying closed loop in the form of a right angle isosceles triangle ABC is placed in a uniform magnetic field acting along AB. If the magnetic force on the arm BC is 
, the force on the arm AC is
Sol.
Answer : (3)
Q.22. The power obtained in a reactor using U235 disintegration is 1000 kW. The mass decay of U235 per hour is
(1) 1 microgram (2) 10 microgram
(3) 20 microgram (4) 40 microgram
Sol.
Answer : (4)
Q. 23. There are four light-weight-rod samples, A, B, C, D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted
(i) A is feebly repelled
(ii) B is feebly attracted
(iii) C is strongly attracted
(iv) D remains unaffected
Which one of the following is true?
(1) A is of a non-magnetic material (2) B is of a paramagnetic material
(3) C is of a diamagnetic material (4) D is of a ferromagnetic material
Sol.
Diamagnetic will be feebly repelled. Paramagnetic will be feebly attracted. Ferromagnetic will be strongly attracted.
Answer : (2)
Q. 24. The electric and the magnetic field, associated with an e.m. wave, propagating along the +z-axis, can be represented by
Sol.
Answer : (2)
Q. 25. A uniform electric field and a uniform magnetic field are acting along the same direction in certain region. If an electron is projected in the region such that its velocity is pointed along direction of fields, then the electron
(1) Will turn towards left of direction of motion
(2) Will turn towards right of direction of motion
(3) Speed will decrease
(4) Speed will increase
Sol.
Bfield will not apply any force. E field will apply a force opposite to velocity of the electron hence, speed will decrease.
Answer : (3)