2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-82

  • question_answer
    A magnetic field of \[2 \times  1{{0}^{-}}^{2}\] T acts at right angles to a coil of area\[100 c{{m}^{2}}\], with 50 turns. The average emf induced in the coil is 0.1 V, when it is removed from the coil in t s. The value of t is

    A)  0.1 s               

    B)  0.01 s

    C)  1 s                              

    D)  10 s

    Correct Answer: A

    Solution :

    \[\varepsilon =\frac{-({{\phi }_{2}}-{{\phi }_{1}})}{t}\,\,=\,\,\frac{-(0-NBA)}{t}\,\,\Rightarrow \,\,\,\,\varepsilon =\frac{NBA}{t}\] \[\Rightarrow \,\,\,\,\,\,\,\,\,t=\frac{NBA}{\varepsilon }=\frac{50\times 2\times {{10}^{-\,2}}}{0.1}=0.1\,s\]


You need to login to perform this action.
You will be redirected in 3 sec spinner