In the circuit shown the cells A and B have negligible resistances. For VA = 12 V, R1 = 500 and R = 100 the galvanometer (G) shows no deflection. The value of VB is:

  • Option 1)

    4 V

  • Option 2)

    2 V

  • Option 3)

    12 V

  • Option 4)

    6 V

 

Answers (1)
V Vakul

As we discussed in

I\:=\:\frac{V_{A}}{R_{1}+R}

I\:=\:\frac{12}{500+100}\:=\:\frac{12}{600}

V_{B}=IR\:=\:\frac{12}{600}\times100=2V


Option 1)

4 V

This option is incorrect.

Option 2)

2 V

This option is correct.

Option 3)

12 V

This option is incorrect.

Option 4)

6 V

This option is incorrect.

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