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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1551. |
What kind of mirror − concave, convex or plain − would be best suited for use in a solar cooker? Why? |
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Answer» What kind of mirror − concave, convex or plain − would be best suited for use in a solar cooker? Why? |
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| 1552. |
2 blocks B and C of mass m each connected by a spring of natural lengthL and spring constant K rest on a smooth horizontal surface .A third block A with same mass collides elastically with block B with velocity v.The maxomum compression is? |
| Answer» 2 blocks B and C of mass m each connected by a spring of natural lengthL and spring constant K rest on a smooth horizontal surface .A third block A with same mass collides elastically with block B with velocity v.The maxomum compression is? | |
| 1553. |
If ∫e3x[3sin4x+4cos4x]dx=e3xk⋅f(x)+C, then which of the following is/are true |
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Answer» If ∫e3x[3sin4x+4cos4x]dx=e3xk⋅f(x)+C, then which of the following is/are true |
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| 1554. |
Which of the following is not a quality of an ideal source of energy? |
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Answer» Which of the following is not a quality of an ideal source of energy? |
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| 1555. |
Why does water expands on heating?? |
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Answer» Why does water expands on heating?? |
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| 1556. |
Four cells each of emf 2 V and internal resistance 1 Ω are connected in parallel with an external resistance of 6 Ω. The current in the external resistance is |
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Answer» Four cells each of emf 2 V and internal resistance 1 Ω are connected in parallel with an external resistance of 6 Ω. The current in the external resistance is |
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| 1557. |
The S.I. unit of specific heat capacity is : (a) J kg−1 (b) J K−1 (c) J kg−1 K−1 (d) kcal kg−1 ∘C−1 |
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Answer» The S.I. unit of specific heat capacity is : (a) J kg−1 (b) J K−1 (c) J kg−1 K−1 (d) kcal kg−1 ∘C−1 |
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| 1558. |
To study the dependence of current (I) on the potential difference (V) across a resistor R, two students used the two setups shown in Figures A and B respectively. They kept the contact point J in four different positions, marked (a), (b), (c) and (d) in the two figures.For the two students, the ammeter and voltmeter readings will be maximum when the contact J is in the position:(1) (d) in both the setups(2) (a) in both the setups(3) (d) in setup A and (a) in setup B(4) (a) in setup A and (d) in setup B |
Answer» To study the dependence of current (I) on the potential difference (V) across a resistor R, two students used the two setups shown in Figures A and B respectively. They kept the contact point J in four different positions, marked (a), (b), (c) and (d) in the two figures. For the two students, the ammeter and voltmeter readings will be maximum when the contact J is in the position: (1) (d) in both the setups (2) (a) in both the setups (3) (d) in setup A and (a) in setup B (4) (a) in setup A and (d) in setup B |
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| 1559. |
A compass needle of magnetic moment 60 Am2, pointing towards geographical north at a certain place where the horizontal component of earth's magnetic field is 40μwb m2 experiences a torque of 1.2×10−3 N-m . The declination at that place _____ (in degree) (Give integer value). |
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Answer» A compass needle of magnetic moment 60 Am2, pointing towards geographical north at a certain place where the horizontal component of earth's magnetic field is 40μwb m2 experiences a torque of 1.2×10−3 N-m . The declination at that place _____ (in degree) (Give integer value). |
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| 1560. |
A student has difficulty reading the blackboard while sitting in the last row. What could be the defect? How can it be corrected? [2 MARKS] |
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Answer» A student has difficulty reading the blackboard while sitting in the last row. What could be the defect? How can it be corrected? [2 MARKS] |
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| 1561. |
Define refractive of a transparent medium |
| Answer» Define refractive of a transparent medium | |
| 1562. |
The leaves appear green when seen in white light. Give a reason. |
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Answer» The leaves appear green when seen in white light. Give a reason. |
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| 1563. |
A triangular loop of side a=10 m carrying current of 2 A is kept in a uniform magnetic field of 30 mT as shown in the figures below. Find the torque about its center in all the three cases in the same order. (Assume the triangular loop is in the first quadrant of x−y plane with BC parallel to x axis) |
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Answer» A triangular loop of side a=10 m carrying current of 2 A is kept in a uniform magnetic field of 30 mT as shown in the figures below. Find the torque about its center in all the three cases in the same order. (Assume the triangular loop is in the first quadrant of x−y plane with BC parallel to x axis) |
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| 1564. |
Roshaan was cycling early morning in his gated community, when he suddenly realized that his next door neighbor had gone for a walk switching on his borewell pump. The overhead tank had been overflowing for quite some time. Roshaan rang his neighbour’s bell but no one answered. What would have you done if you were in place of Roshaan ? [2 MARKS] |
| Answer» Roshaan was cycling early morning in his gated community, when he suddenly realized that his next door neighbor had gone for a walk switching on his borewell pump. The overhead tank had been overflowing for quite some time. Roshaan rang his neighbour’s bell but no one answered. What would have you done if you were in place of Roshaan ? [2 MARKS] | |
| 1565. |
Difference between rarer and dense medium |
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Answer» Difference between rarer and dense medium |
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| 1566. |
Astigmatism (for a human eye) can be removed by using ___. |
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Answer» Astigmatism (for a human eye) can be removed by using ___.
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| 1567. |
why resistance of an ammeter should be as low as possible? |
| Answer» why resistance of an ammeter should be as low as possible? | |
| 1568. |
A stake of 50 identical cubical blocks each of mass 20 kg and volume 0.125 m3 are placed over one another over a horizontal floor. The total pressure exerted on the floor by them is \lbrack Take g = 10 m/s2\rbrack m is \lbrack Take g = 10 m/s2\rbrack |
| Answer» A stake of 50 identical cubical blocks each of mass 20 kg and volume 0.125 m3 are placed over one another over a horizontal floor. The total pressure exerted on the floor by them is \lbrack Take g = 10 m/s2\rbrack m is \lbrack Take g = 10 m/s2\rbrack | |
| 1569. |
An arrow moves forward when released from a stretched bow. Explain the transformation of energy in the process. |
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Answer» An arrow moves forward when released from a stretched bow. Explain the transformation of energy in the process. |
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| 1570. |
A biconvex thick lens is constructed with glass (ref. index = 1.50). Each of the surface has a radius of 10cm and the thickness at the middle is 5cm. Locate the image of an object placed far away from the lens |
| Answer» A biconvex thick lens is constructed with glass (ref. index = 1.50). Each of the surface has a radius of 10cm and the thickness at the middle is 5cm. Locate the image of an object placed far away from the lens | |
| 1571. |
The working of a barber’s mirror involves the phenomenon of |
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Answer» The working of a barber’s mirror involves the phenomenon of |
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| 1572. |
A plane wavefront incident on a reflected surface at an angle of 30 degree with vertical. Find the angle(acute) of reflected wave with vertical. |
| Answer» A plane wavefront incident on a reflected surface at an angle of 30 degree with vertical. Find the angle(acute) of reflected wave with vertical. | |
| 1573. |
Why does a short circuit damage electro wiring and devices connected to it? |
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Answer» Why does a short circuit damage electro wiring and devices connected to it? |
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| 1574. |
Name the phenomenon due to which the stars seem higher in the sky than they actually are. |
| Answer» Name the phenomenon due to which the stars seem higher in the sky than they actually are. | |
| 1575. |
For the reaction 2 A(g) + B(g) = 2D(g)Delta U = - 10.5 kJ and delta S = -44.1 J/KCalculate delta G for the reaction |
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Answer» For the reaction 2 A(g) + B(g) = 2D(g) Delta U = - 10.5 kJ and delta S = -44.1 J/K Calculate delta G for the reaction |
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| 1576. |
Convex lens of very short focal length will make: |
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Answer» Convex lens of very short focal length will make: |
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| 1577. |
(a) Why do isotopes have same chemical properties? (b) Why do isobars have different chemical properties? [3 MARKS] |
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Answer» (a) Why do isotopes have same chemical properties? (b) Why do isobars have different chemical properties? [3 MARKS] |
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| 1578. |
Which of the following mirror has the highest field of view? |
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Answer» Which of the following mirror has the highest field of view? |
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| 1579. |
When electrons are removed/added from/to the outermost shell of an atom, ______are formed. |
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Answer» When electrons are removed/added from/to the outermost shell of an atom, ______are formed. |
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| 1580. |
A sample of coal produces 9 MJ of heat energy on complete combustion of 250 g of coal. The calorific value of coal sample is |
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Answer» A sample of coal produces 9 MJ of heat energy on complete combustion of 250 g of coal. The calorific value of coal sample is |
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| 1581. |
What are the important differences between looking at a photograph of your face and looking at yourself in a plane mirror ? |
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Answer» What are the important differences between looking at a photograph of your face and looking at yourself in a plane mirror ? |
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| 1582. |
The diagram is Fig. 9.26 shown a three pin plug. Label the three pins. (a) Why is the top pin thicker and longer than the other two ? (b) Why are the pins splitted at the ends ? |
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Answer» The diagram is Fig. 9.26 shown a three pin plug. Label the three pins. (a) Why is the top pin thicker and longer than the other two ? (b) Why are the pins splitted at the ends ?
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| 1583. |
Calculate the equivalent resistance of two resistors having resistances 3 Ω and 6 Ω connected in parallel. |
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Answer» Calculate the equivalent resistance of two resistors having resistances 3 Ω and 6 Ω connected in parallel. |
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| 1584. |
Electric charges +10μC,+5μC, and +8μC are placed at the corners of a square of side √2m. The potential at the centre of the square is |
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Answer» Electric charges +10μC,+5μC, and +8μC are placed at the corners of a square of side √2m. The potential at the centre of the square is |
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| 1585. |
(a) A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where is his image and how wide is the image of his mouth? (b) The boy walks towards the mirror at a speed of 1 m/s. At what speed does his image approach him? |
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Answer» (a) A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Where is his image and how wide is the image of his mouth? (b) The boy walks towards the mirror at a speed of 1 m/s. At what speed does his image approach him? |
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| 1586. |
If 240V voltage is applied to an electric heater , 2 A curcurr passes through it. Find the current flowing in the heater if 120V voltage is applied to it and also calculate the resistance of the coil of heater. |
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Answer» If 240V voltage is applied to an electric heater , 2 A curcurr passes through it. Find the current flowing in the heater if 120V voltage is applied to it and also calculate the resistance of the coil of heater. |
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| 1587. |
How to plot simple harmonic wave. |
| Answer» How to plot simple harmonic wave. | |
| 1588. |
14. While working on aproject we need a 4 micro faraday capacitor in a circuit across a potential difference of 1 KV. 4 micro faraday capacitor are out of stock .but there is 2 micro faraday capacitor are available which can withstand a potential difference of 400 V. How many number of capacitor are required 1) 16 2)18 3) 20 4) 12 |
| Answer» 14. While working on aproject we need a 4 micro faraday capacitor in a circuit across a potential difference of 1 KV. 4 micro faraday capacitor are out of stock .but there is 2 micro faraday capacitor are available which can withstand a potential difference of 400 V. How many number of capacitor are required 1) 16 2)18 3) 20 4) 12 | |
| 1589. |
A parallel beam of monochromatic light is incident normally on a perfectly reflecting surface. The incident radiation has the power as 2.1387×10−27 W. The force exerted by the light beam on the surface by each photon is (h=6.63×10−34 Js) |
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Answer» A parallel beam of monochromatic light is incident normally on a perfectly reflecting surface. The incident radiation has the power as 2.1387×10−27 W. The force exerted by the light beam on the surface by each photon is (h=6.63×10−34 Js) |
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| 1590. |
Due to some accident, if the eyeball is shortened. Then the person is said to have |
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Answer» Due to some accident, if the eyeball is shortened. Then the person is said to have |
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| 1591. |
Inside the magnet the field lines run : |
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Answer» Inside the magnet the field lines run : |
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| 1592. |
the magnetic field outside a long solenoid is? 'why |
| Answer» the magnetic field outside a long solenoid is? 'why | |
| 1593. |
Out of 60 W and 40 W lamps, which one has a higher electrical resistance when in use? |
| Answer» Out of 60 W and 40 W lamps, which one has a higher electrical resistance when in use? | |
| 1594. |
Which of the following have zero average value in a plane electromagnetic wave? |
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Answer» Which of the following have zero average value in a plane electromagnetic wave? |
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| 1595. |
In a conservative field, the potential energy U as a function of position x is given by U = x2. Then the corresponding conservative force is given by Options:a- x b-2x c- –x d-–2x |
| Answer» In a conservative field, the potential energy U as a function of position x is given by U = x2. Then the corresponding conservative force is given by Options:a- x b-2x c- –x d-–2x | |
| 1596. |
70. How to find co-ordinates of centre of mass of a system. |
| Answer» 70. How to find co-ordinates of centre of mass of a system. | |
| 1597. |
A ball hits a wall horizontally at 6.0m/s. It rebound horizontally at 4.4m/s.The ball is contact with the wall for.0.040s. What is the acceleration of the ball |
| Answer» A ball hits a wall horizontally at 6.0m/s. It rebound horizontally at 4.4m/s.The ball is contact with the wall for.0.040s. What is the acceleration of the ball | |
| 1598. |
Where in the sky would you expect to see a rainbow in the evening? |
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Answer» Where in the sky would you expect to see a rainbow in the evening? |
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| 1599. |
A point light source is kept in front of a convex mirror at a distance of 40 cm. The focul length of the mirror is 40 cm. Find the position of image. |
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Answer» A point light source is kept in front of a convex mirror at a distance of 40 cm. The focul length of the mirror is 40 cm. Find the position of image. |
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| 1600. |
Why don't we use Joule as commercial unit? How many Joule will make up 1kWh. |
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Answer» Why don't we use Joule as commercial unit? How many Joule will make up 1kWh. |
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