Physics question and answers for February 17, 2024
- Q A nuclear power plant operates at 69 % of its maximum theoretical (Carnot) efficiency between temperatures of 665 C and 310 C.If the plant produces electric energy at the rate...
- Q 1.5 kg of water at 27 C is mixed with 1.5 kg of water at 60 C in a well-insulated container. Estimate the net change in entropy of the system....
- Q A dead body was found within a closed room of a house where the temperature was a constant 70 F. At the time of discovery the core temperature of the...
- Q P-V diagram of an ideal diatomic gas is a straight line passing through origin. The molar heat capacity of the ideal gas in the process is n times the molar...
- Q A gas inside a piston-cylinder assemblyundergoes a refrigeration cycle consisting ofthese three processes:Process 1-2: Compression with pV = constantfrom p? = 1 bar, V? = 1 m, to p? =...
- Q Explain the energy flow in a heat engine with a neat labelleddiagram and define the thermal efficiency of a heat engine.
- Q 2 moles of an ideal gas is taken through a process for which the variation of internal energy (U) is shown in the figure. Temperature at points A and Care...
- Q A 1.00-L insulated bottle is full of tea at 90.0C. You pour out one cup of tea and immediately screw the stopper back on the bottle. Make an order-of-magnitude estimate...
- Q According to Einstein's equation E = mc. E represents the rest mass energy of an object with rest mass m, c is the speed of light in vacuum, and is...
- Q What is the best coefficient of performance for a heat pump with a hot reservoir of 50C and a cold reservoir of -20C?b. How much heat transfer occurs into the...
- Q The diagram shows a generic heat pump operating between two temperature reservoirs. Here are the values for the variables indicated in the graphic:TH=615 KTL = 316 KQH=9550 JQL=1230 JAnswer the...
- Q 70 cm of gasoline are mixed with 70 cm of water. What is the average density of the mixture?
- Q The ideal gas in a Carnot engine extracts 1200 J of hoat energy during the isothermal expansion at 250 C.How much heat energy is exhausted during the isothermal compression at...
- Q A heat engine operating between energy reservoirs at 20C and 590 C has 32 % of the maximumpossible efficiency.How much energy must this engine extract from the hot reservoir to...
- Q A Carnot heat engine uses a hot reservoirconsisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. In 5...
- Q A disc is charged non uniformly with charge per unit area depending on distance x from the centre as o cx 1 5 0 The radius of disc is 3m...
- Q Charge Q and 2Q are distributed uniformly on surface of two concentric spherical shells of radii R and 2R respectively as shown in the figure Select correct alternative s A...
- Q The potential gradient along the length of uniform wire is 10 Vm The length of the wire is 1 m What is the potential difference across two points on the...
- Q Q Analyse the case of electrostatic shielding and answer the following questions i Draw the electric field lines when a charge is kept in metal cavity What will be affect...
- Q Four non conducting wires each with mass m and length I are joined to form a square They are being charged with charge per unit length or as shown in...
- Q P I O Vpg 0 O A sphere carries a total charge which is negative and distributed uniformly on the surface Consider the potential difference Veg Vp Vo for the...
- Q A body having specific charge 8 C g is resting on a frictionless plane at a distance 10 cm from the wall as shown in the figure It starts moving...
- Q An object with charge q 2 C starts in a region at an electric potential of 10 V and then is moved to a region at 20V It then continues...
- Q 10 A small coin is resting on the bottom of a filled with a liquid A ray of light from the coin travels upto the surface of the liquid and...
- Q 0 A thick shell with inner radius R and outer radius 3R has uniform density p c m It has a spherical cavity of radius R as shown in the...
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