MCQ
Two vectors $\vec{A}$ and $\vec{B}$ are at right angles to each other, when
- A$\vec{A} \quad \vec{B} \quad 0$
- B$\vec{A} \quad \vec{B} \quad 0$
- C$\vec{A} \cup \vec{B} \quad 0$
- ✓$\vec{A} \cdot \vec{B} 0$
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Assertion $A:$ For measuring the potential difference across a resistance of $600\,\Omega$, the voltmeter with resistance $1000\,\Omega$ will be preferred over voltmeter with resistance $4000\,\Omega$.
Reason $R:$ Voltmeter with higher resistance will draw smaller current than voltmeter with lower resistance.
In the light of the above statements, choose the most appropriate answer from the options given below.