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Indian Navy SSR (Sailor) — free MCQ practice

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Try a Indian Navy SSR (Sailor) question

Kirchhoff's Current Law is a direct consequence of conservation ofRead the answer and worked solution →An event having only one outcome of an experiment is calledRead the answer and worked solution →Choose the correct value of $(\sec A+\tan A)(1-\sin A)$.Read the answer and worked solution →Which equation best represents the essential ionic change in a neutralization reaction?Read the answer and worked solution →

Worked practice questions

Kirchhoff's Current Law is a direct consequence of conservation of

  1. energy
  2. charge
  3. momentum
  4. resistance
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Correct answer: B. charge

KCL follows from conservation of charge. Since charge cannot accumulate indefinitely at an ideal junction, the total current entering must equal the total current leaving.

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An event having only one outcome of an experiment is called

  1. a sure event
  2. an impossible event
  3. an elementary event
  4. a complementary event
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Correct answer: C. an elementary event

An elementary event is defined as an event that contains exactly one outcome of the experiment. **So option C is correct.**

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Choose the correct value of $(\sec A+\tan A)(1-\sin A)$.

  1. $\sec A$
  2. $\sin A$
  3. $\csc A$
  4. $\cos A$
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Correct answer: D. $\cos A$

**Rewrite in terms of sine and cosine:** $(\frac{1}{\cos A}+\frac{\sin A}{\cos A})(1-\sin A)=\frac{1+\sin A}{\cos A}(1-\sin A)$. This becomes $\frac{1-\sin^2 A}{\cos A}=\frac{\cos^2 A}{\cos A}=\cos A$.

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