All India Engineering / Architecture Entrance Examination (AIEEE)
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AIEEE 2007 Physics
Q. 5. An ideal coil of 10 H is connected in series with a resistance of 
and a battery of 5V. 2 seconds after the connection is made, the current flowing in amperes in the circuit is
- (1 - e)
- e
Sol: 
Correct choice: (4)
Q. 6. A long straight wire of radius a carries a steady current i. The current is uniformly distributed across its cross section. The ratio of the magnetic field at 
and 2a is
- 4
- 1
Sol: 
Correct choice: (3)
Q. 7. A current I flows along the length of an infinitely long, straight, thin walled pipe. Then
- the magnetic field is zero only on the axis of the pipe
- the magnetic field is different at different points inside the pipe
- the magnetic field at any point inside the pipe is zero
- the magnetic field at all points inside the pipe is the same, but not zer
Sol: Magnetic field inside the infinitely long pipe is zero at all points. Correct choice: (3)
Q. 8. If 
is the mass of an oxygen isotope 
, are the masses of a proton and a neutron respectively, the nuclear binding energy of the isotope is
Sol: Nuclear binding energy 
Correct choice: (2)