A ray of monochromatic light is passing through an equilateral prism \((ABC)\) as shown in the figure. The refracted ray \((QR)\) is parallel to its base \((BC)\) and the angle of incidence \((i)\) is \(50^\circ\). Then the angle of deviation \((\delta)\) is:
1. \( 45^\circ \)
2. \( 40^\circ \)
3. \( 35^\circ \)
4. \( 55^\circ \)
1. \( 45^\circ \)
2. \( 40^\circ \)
3. \( 35^\circ \)
4. \( 55^\circ \)
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In a metre bridge experiment (see figure), the positions of the cell, \(E,\) and galvanometer, \(G,\) are interchanged. We shall observe in the galvanometer:
| 1. | Only the left-sided deflection |
| 2. | Both right-sided and left-sided deflection and at balance point, no deflection |
| 3. | Only the right-sided deflection |
| 4. | There will be no deflection irrespective of the position of the jockey |
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A flask contains argon and chlorine in the ratio of 2:1 by mass. The temperature of the mixture is 27°C. The ratio of root mean square speed of the molecules of the two gases \(\left(\frac{\mathrm{v}_{\mathrm{rms}}^{\mathrm{Ar}}}{\mathrm{v}_{\mathrm{rms}}^{\mathrm{Cl}}}\right)~\)is:
1. \(\frac{7}{4}\)
2. \(\frac{\sqrt{7}}{2}\)
3. \(\frac{\sqrt{2}}{7}\)
4. \(\frac{7}{2}\)
1. \(\frac{7}{4}\)
2. \(\frac{\sqrt{7}}{2}\)
3. \(\frac{\sqrt{2}}{7}\)
4. \(\frac{7}{2}\)
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Two statements are given below:
Choose the correct answer from the options given below:
| A. | When the forward bias voltage across a p-n junction diode increases above a certain threshold voltage, the diode current increases significantly. |
| B. | This current is called reverse saturation current. |
Choose the correct answer from the options given below:
| 1. | Statement A is true, but Statement B is false |
| 2. | Both Statements A and B are true |
| 3. | Both Statements A and B are false |
| 4. | Statement A is false, but Statement B is true |
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For a travelling harmonic wave
\(y(x, t) = 2 \cdot 0 \cos 2\pi(10 t - 0 \cdot 0080 x + 0 \cdot 35)\), where \(x\) and \(y\) are in cm and \(t\) in s. The phase difference between oscillatory motion of two points separated by a distance of 0·5 m is :
1. \(0 \cdot 8\pi \text{ rad}\)
2. \(8\pi \text{ rad}\)
3. \(0 \cdot 008\pi \text{ rad}\)
4. \(0 \cdot 08\pi \text{ rad}\)
\(y(x, t) = 2 \cdot 0 \cos 2\pi(10 t - 0 \cdot 0080 x + 0 \cdot 35)\), where \(x\) and \(y\) are in cm and \(t\) in s. The phase difference between oscillatory motion of two points separated by a distance of 0·5 m is :
1. \(0 \cdot 8\pi \text{ rad}\)
2. \(8\pi \text{ rad}\)
3. \(0 \cdot 008\pi \text{ rad}\)
4. \(0 \cdot 08\pi \text{ rad}\)
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A rectangular wire loop of sides 8 cm and 3 cm with a small cut, is moving out of a region of uniform magnetic field of magnitude \(\)\(0 \cdot 3 \mathrm{~T} \) directed normal to the plane of the loop. The emf developed across the cut, if the velocity of the loop is \(2 \mathrm{~cm} \mathrm{~s}^{-1}\), in a direction normal to the shorter side of the loop will be:
1. \(4 \cdot 8 \times 10^{-4} \text { volt }\)
2. \(1 \cdot 3\times 10^{-4} \text { volt }\)
3. \(1 \cdot 2\times 10^{-4} \text { volt }\)
4. \(1 \cdot 8\times 10^{-4} \text { volt }\)
1. \(4 \cdot 8 \times 10^{-4} \text { volt }\)
2. \(1 \cdot 3\times 10^{-4} \text { volt }\)
3. \(1 \cdot 2\times 10^{-4} \text { volt }\)
4. \(1 \cdot 8\times 10^{-4} \text { volt }\)
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A thin wire of length 'L' and linear mass density 'm' is bent into a circular ring (in x-y plane) with centre 'C' as shown in figure. The moment of inertia of the ring about an axis yy' will be :
1. \(\dfrac{3 mL^2}{8 \pi}\)
2. \(\dfrac{3 mL^2}{8 \pi^2}\)
3. \(\dfrac{3 mL^3}{8 \pi}\)
4. \(\dfrac{3 mL^3}{8 \pi^2}\)
1. \(\dfrac{3 mL^2}{8 \pi}\)
2. \(\dfrac{3 mL^2}{8 \pi^2}\)
3. \(\dfrac{3 mL^3}{8 \pi}\)
4. \(\dfrac{3 mL^3}{8 \pi^2}\)
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A resistor is connected to a battery of 12 V emf and internal resistance 2 Ω. If the current in the circuit is 0.6 A, the terminal voltage of the battery is :
1. \(10 \cdot 8 \mathrm{~V}\)
2. \(1 \cdot 2 \mathrm{~V}\)
3. \(12 \mathrm{~V}\)
4. \(10 \mathrm{~V}\)
1. \(10 \cdot 8 \mathrm{~V}\)
2. \(1 \cdot 2 \mathrm{~V}\)
3. \(12 \mathrm{~V}\)
4. \(10 \mathrm{~V}\)
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When a ruler falls vertically, 5 different persons catch it with different reaction times. \((g = 9.8 \text{ m s}^{-2})\)
What is the correct order of the distance travelled by the ruler for each person?
| A. | Person A has reaction time of 0·20 s. |
| B. | Person B has reaction time of 0·22 s. |
| C. | Person C has reaction time of 0·18 s. |
| D. | Person D has reaction time of 0·19 s. |
| E. | Person E has reaction time of 0·21 s. |
What is the correct order of the distance travelled by the ruler for each person?
| 1. | C > D > A > E > B |
| 2. | C > D > A > B > E |
| 3. | B > E > A > D > C |
| 4. | B > E > A > C > D |
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The angular speed of a flywheel is increased from 600 rpm to 1200 rpm in 10 s. The number of revolutions completed by the flywheel during this time is :
1. 300
2. 150
3. 900
4. 600
1. 300
2. 150
3. 900
4. 600
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