2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-44

  • question_answer
    A coil having 500 turns of square shape each of side 10 cm is placed normal to a magnetic field which is increasing at IT/s. The induced emf is:

    A) 0.1V                

    B) 0.5V   

    C) 1V                   

    D) 5V

    Correct Answer: D

    Solution :

    \[\operatorname{Induced} emf ==\frac{d\phi }{dt}\] \[\phi =BA\,\,cos\theta \] \[\phi =BA\,\,cos0{}^\circ  =BA\] \[\operatorname{emf}=\frac{d\left( BA \right)}{dt}=\frac{dB}{dt}A\] \[\operatorname{emf} = \frac{nA.dB}{dt}~~~~~\left[ for 'n' = 500 turns \right]\] \[\operatorname{emf}500\times \frac{10\times 10}{100\times 100}\times 1=5V\]


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