Q. A disc shaped magnet levitage above a superconducting material that has been cooled by liquid nitrogen. this happens because a superconductor is
A) Diamagnetic
B) Nonmagnetic
C) paramagnetic
D) Ferromagnetic

Related Questions

Q. Superposition of two waves trains of amplitudes and nearly same frequiencies, moving in the same direction, results in the formation of beats. The maximum loudness heard at the waxing is 'n' times the loudness of each of the componet wave trains. the value of n is
A) 1
B) 2
C) 4
D) 8
Q. An ideal gas engine operates in a carnot cycle. it absorbs heat at a temperature T1 and exhaust heat at T2. the efficiency of this engine is
A) (T1-T2)/T1
B) (T1+T2)/T1
C) (T1-T2)/T2
D) T1/T2
Q. The manifestation of band structure in solids is a consequence of
A) Pauli's exclusion principle
B) Heisenberg's uncertainity principle
C) Bohr's principle  
D) Ohm's law
Today Challenging Question
Q. the present ages of A and B are 2:5. nine years ago their ages were in the ratio 1:4. find the present age of A
A) 18
B) 20
C) 22
D) 24
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