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Mathematics in Physics question bank (Physics)

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Q1.

The resultant of two vectors $\vec{A}$ and $\vec{B}$ is perpendicular to $\vec{A}$ and the magnitude is $\dfrac{1}{\sqrt{2}}$ times that of $\vec{B}$ . The angle between $\vec{A}$ and $\vec{B}$ is

(A)

$45^\circ$

(B)

$135^\circ$

(C)

$90^\circ$

(D)

$120^\circ$

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Q2.

The heat generated in a circuit is given by $Q = I^2 R t$. If the percentage error in the measurement of $Q$ is $1\%$, $R$ is $2\%$, and $t$ is $1\%$, then the percentage error in the measurement of current $I$ is

(A)

$3\%$

(B)

$2\%$

(C)

$4\%$

(D)

$5\%$

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