1.

A solenoid of 1.5 metre length and 4.0 cm diameter posses 10 turn per cm. A current of 5 ampere is flowing through it. The magnetic induction at axis inside the solenoid is [CPMT 1990]

A.            \[2\pi \times {{10}^{-3}}\,tesla\]    
B.            \[2\pi \times {{10}^{-5}}\,Tesla\]
C.            \[4\pi \times {{10}^{-2}}\,Gauss\] 
D.            \[2\pi \times {{10}^{-5}}\,gauss\]
Answer» B.            \[2\pi \times {{10}^{-5}}\,Tesla\]


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