2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-20

  • question_answer
    In the circuit shown in the figure the cells \[{{E}_{1}}\]and \[{{E}_{2}}\]have emfs. of 4 V and 8 V and internal resistance\[0.5\Omega \]and\[1\Omega ,\]respectively, Then the pd. Across \[{{E}_{1}}\]and\[{{E}_{2}}\] will be:

    A) \[4.25\,V;\,4.25\,V\]     

    B) \[3.75\,V;\,3.75\,V\]

    C)      \[4.25\,V;\,7.5\,V\]       

    D)      \[3.75\,V;\,7.5\,V\] 

    Correct Answer: C

    Solution :

    Cell of higher e.m.f. will send the current in the circuit. Effective e.m.f. = 8 - 4 = 4 V Effective resistance \[=0.5+1+4.5+\frac{3\times 6}{3+6}=8\Omega \] current, 1=4/8= 0.5 A Terminal pot. diff. across\[{{E}_{1}}\] \[=4+0.5\times 0.5=4.25\,V\] Terminal pot. diff. across E                          \[=8-0.5\times 1=7.5\,V\] Hence, the correction option is (c).


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