1. A
   An ammeter is always connected in series in the circuit to measure the current
2. B
   A Voltmeter is always connected to parallel in a circuit to measure the voltage
3. C
   A voltmeter has a high resistance and an ammeter has a low resistance
4. D
   A voltmeter has a low resistance and an ammeter has a high resistance

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1. A
   Petroleum
2. B
   Natural Gas
3. C
   Tidal energy
4. D
   Coal

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1. A
   1 Ohm
2. B
   $\frac{1}{3}$ Ohm
3. C
   3 Ohm
4. D
   9 Ohm

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1. A
   Refraction of sound waves
2. B
   Reflection of sound waves
3. C
   Diffraction of sound waves
4. D
   Resonance due to sound waves

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1. A
   Maximum
2. B
   Minimum
3. C
   Zero
4. D
   Constant

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1. A
   straight lines
2. B
   rectangular hyperbolas
3. C
   parabolas
4. D
   circles

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1. A
   3
2. B
   6
3. C
   7
4. D
   9

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1. A
   24
2. B
   26
3. C
   52
4. D
   $5(\sqrt{2}-1)$

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1. A
   15
2. B
   6
3. C
   0
4. D
   -1

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1. A
   16
2. B
   8
3. C
   4
4. D
   2

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1. A
   2840
2. B
   2780
3. C
   2920
4. D
   5700

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1. A
   -1
2. B
   0
3. C
   1
4. D
   2

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1. A
   $A^2$ is symmetric with $\det(A^2)=0$.
2. B
   $A^2$ is symmetric with $\det(A^2)\neq 0$.
3. C
   $A^2$ is skew-symmetric with $\det(A^2)=0$.
4. D
   $A^2$ is skew-symmetric with $\det(A^2)\neq 0$.

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1. A
   1 and 2 only
2. B
   2 and 3 only
3. C
   1 and 3 only
4. D
   1, 2 and 3

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1. A
   $a$, $b$ and $c$ are in AP
2. B
   $a-b$, $b-c$ and $c-a$ are in AP
3. C
   $a$, $b$ and $c$ are in GP
4. D
   $a-b$, $b-c$ and $c-a$ are in GP

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1. A
   $t_{10}$
2. B
   $t_{10}^2$
3. C
   $t_{11}$
4. D
   $t_{11}^{21}$

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1. A
   $1+i$
2. B
   $\frac{1-i}{\sqrt{2}}$
3. C
   $\frac{1+i}{\sqrt{2}}$
4. D
   $\frac{1}{\sqrt{2i}}$

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1. A
   45
2. B
   60
3. C
   90
4. D
   120

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1. A
   5
2. B
   6
3. C
   7
4. D
   8

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1. A
   -1
2. B
   0
3. C
   1
4. D
   2

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1. A
   0 only
2. B
   an even number but not necessarily 0
3. C
   an odd number
4. D
   0, 1 or -1

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1. A
   5
2. B
   25
3. C
   125
4. D
   625

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1. A
   Null matrix of order 3
2. B
   Identity matrix of order 3
3. C
   $\begin{pmatrix}2&0&0\\0&2&0\\0&0&2\end{pmatrix}$
4. D
   $\begin{pmatrix}7&0&0\\0&7&0\\0&0&7\end{pmatrix}$

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1. A
   3
2. B
   9
3. C
   81
4. D
   729

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1. A
   100
2. B
   1000
3. C
   9900
4. D
   10000

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