SATHEE: Current Electricity - Result Question 45

Current Electricity - Result Question 45

47. In the circuit shown in the figure, if potential at point $A$ is taken to be zero, the potential at point $B$ is

[2011M]

(a) $- 1 V$

(b) $+ 2 V$

(d) $+ 1 V$

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Answer:

Correct Answer: 47. (d)

Solution:

(d) Current from $D$ to $C = 1 A$

$\begin{aligned} ∴ V_{D} - V_{C} = 2 \times 1 = 2 V \\ V_{A} = 0 ∴ V_{C} = 1 V, ∴ V_{D} - V_{C} = 2 \\ \Rightarrow V_{D} - 1 = 2 ∴ V_{D} = 3 V \\ ∴ V_{D} - V_{B} = 2 ∴ 3 - V_{B} = 2 ∴ V_{B} = 1 V \end{aligned}$

E.C.E. $= 0.367 \times 10^{- 6} k g C - 1$

Charge per minute $= (I \times 60) C$

$= \frac{10^{5} \times 60}{125} C = \frac{6 \times 10^{6}}{125} C$

$∴$ Mass liberated, $= \frac{6 \times 10^{6}}{125} \times 0.367 \times 10^{- 6}$

$= \frac{6 \times 1000 \times 0.367 \times 10^{- 3}}{125}$

$= 17.616 \times 10^{- 3} k g$

Current Electricity - Result Question 45

47. In the circuit shown in the figure, if potential at point $A$ is taken to be zero, the potential at point $B$ is

Answer:

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Current Electricity - Result Question 45

47. In the circuit shown in the figure, if potential at point A is taken to be zero, the potential at point B is

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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47. In the circuit shown in the figure, if potential at point $A$ is taken to be zero, the potential at point $B$ is