Class-XI-PHYSICS Interview Questions and Answers

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Q: A liquid cools from 65°C to 55°C in 5 mins. If the surrounding temperature is 35℃, calculate the time taken for temperature to fall from 45°C to 35°C.

asked Oct 6, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: Which of the following variables is intensive?

asked Oct 6, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What is the coefficient of performance of a refrigerator? Let Q1 be the heat released to hot reservoir, Q2 be the heat extracted from a cold reservoir & W be the work done on the refrigerator.

asked Oct 6, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A process is carried out between 2 systems. It is possible for entropy of one system to decrease. True or False?

asked Oct 6, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What is the correct order of steps for a carnot cycle?

asked Oct 6, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What is the number of molecules in 2.24L of SO2 at STP?

asked Oct 6, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A particle is in SHM. When displacement is ‘a‘ potential energy is 8J. When displacement is ‘a‘ potential energy is 18J.

asked Oct 6, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A spring block system is on a horizontal surface. The block is compressed by 10cm. What should be the coefficient of friction between the block and ground such that the block comes to a stop at the mean position?

asked Oct 6, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What is the length of a seconds pendulum?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What is the minimum velocity required for an object of mass “m” to escape the gravitational pull of a planet of mass “M” and radius “R” from its surface?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: The radius of a planet is “R” and mass is “M”. A satellite revolves around it in an orbital radius of “r” and an orbital velocity “v”. How would you express the acceleration due to gravity on the surface of the planet?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A satellite revolves around a planet of radius “Q”. If the angular velocity of the satellite is “w” and the radius of the orbit is “4nQ”, where “n” is an integer,

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: CARTOSAT is a group of geostationary satellites sent up by India.

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: The height of the geostationary satellites above the earth’s surface is approximately 36,000 km.

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A material have a stress strain curve which can look similar to the equation y = x^2 (for all x>0). True or False?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A lake has a depth of 500m. The bulk modulus of water is 2*10^9N/m^2. Calculate the fractional compression, ΔV/V, of water at the bottom of the lake.

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: Assume a force of 30 N is distributed over a surface of area 2m^2 in such a way that at each point force can be considered to act at an angle of 30° to the normal at that point.

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: When an object is heated its temperature definitely increases?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What is absolute zero?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: Same amount of heat is added to two substances of same mass having specific heat capacities s1 & s2 such that s1 > s2. Select the correct statement.

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What will be the value of temperature of hot reservoir in a carnot cycle, if the temperature of cold reservoir is 25°C, heat absorbed from hot reservoir is 12J and heat rejected to cold reservoir is 4J?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: John Dalton said that atoms are the smallest constituents of elements. True or False?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: Consider a gas inside a box. It exerts some pressure on its walls. Find this value. GIven that number of molecules per unit volume be 20, mass of each molecule 10^-20kg, vx^2 = 1m^2/s^2.

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What is the ratio of specific heats for a diatomic gas?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A particle is undergoing SHM. If its potential energy is given by: U = kx^2. What will be the value of x for potential energy to be 1/3rd of kinetic energy? Assume k is force constant.

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: Resonance occurs when frequency of forced oscillations is close to natural frequency. True or False?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A 4kg eagle picks up a 75g snake and raises it 2.5 m from the ground to a branch. What is the work done to raise the bird’s own centre of mass to the branch? (Assume g = 10 m/s^2)

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: What is the magnitude of the ratio of KE and PE of a satellite revolving around a planet in a circular orbit of radius “R”?

asked Oct 5, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A satellite of mass “m” is in a circular orbit of radius 1.5R around the earth of radius R. How much energy is required to move it to an orbit of radius 2R?

asked Oct 4, 2021 in Class-XI-PHYSICS by Sandeepthukran

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Q: A wire has a young’s modulus of 10^5N/m^2, length 1m & radius 3mm. Assuming a uniform cross sectional area, find the radius of wire after it is under a force of 1N from both ends

asked Oct 4, 2021 in Class-XI-PHYSICS by Sandeepthukran

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