Physics question and answers for March 10, 2024
- Q sec ERA op Manto A metal bar of length and area of cross section A is clamped between two rigid vertical supports The Young s modulus of rod is Y...
- Q Two wires of equal length and cross section area suspended as shown in figure Thier Young s modulus are Y and Y respectively The equivalent Young s modulus will be...
- Q 7 A copper wire is held at the two ends by rigid supports At 50 C the wire is just taut with negligible tension If Y 1 2 10 1...
- Q The resistance of a metal increases with increasing temperature because VITEEE 2008 a The collisions of the conducting electrons with the electrons increase b The collisions of the conducting electrons...
- Q 11 In a practical application of flexural formula SSB carrying UDL w per unit length on the entire span The maximum bending moment will be equal to WL 2 8...
- Q A brass rod and an aluminium rod each of length 1 m and same cross section area 1 cm are placed in contact with each other as shown Temperature of...
- Q A steel rod of radius 2 4 cm the ends of which are fixed is subjected to a tensile force of modulus 19 kN at both ends What is the...
- Q This shows that n depends only upon T and T i e independent of working substance For 100 efficiency T must be OK i e the temperature of the sink...
- Q c The temperature of an ideal gas at initial pressure P and volume V is increased isochorically until the pressure is doubled The gas is then expanded isothermally until the...
- Q 2 moles of He are mixed with 2 moles of H in a closed adiabatic container Initially the mixture occupies 3 litres at 27 C The volume 3 is suddenly...
- Q b Consider that an ideal gas initially confined in a volume at any given temperature is allowed to expand and the whole arrangement is thermally insulated Is it possible not...
- Q 22 A horizontal uniform tube open at both ends is containing a liquid of certain length at some temperature When the temperature is changed the length of the liquid in...
- Q unit 100K T 1000 K where T is the For a 2 m long rod at 127 C the linear expansion coefficient is a T temperature of rod in Kelvin...
- Q 40 r 11 A substance having coefficient of critical expansion 4 9x 10 4 C The fractional change in the density 2 for the rise in temperature 30 K is...
- Q 4 The length of a steel rod is 5 cm longer than that of a brass rod If this difference in their lengths is to remain the same at all...
- Q Diagram shows the variation of potential energy with separation between the two atoms for three different substances All the objects are nearly at absolute zero temperature Choose the correct statement...
- Q A copper rod 2 m long has a circular cross section of radius 1 cm One end is kept at 100 C and the other at 0 C and the...
- Q The coefficient of thermal conductivity of copper is nine times that of steel In the composite cylindrical bar shown in the figure what will be the temperature at the junction...
- Q Two straight metallic strips each of thickness t and length L are nveted together Their coefficient of inear expansions are a and dp If they are heated through temperature AT...
- Q The ends Q and R of two thin wires PQ and RS are soldered joined together Initially each of the wires has a length of 1 m at 10 C...
- Q Which of the following circular rods given radius r and length each made of the same material as whose ends are maintained at the same temperature will conduct most heat...
- Q Six identical metallic rods are joined together in a pattern as shown in the figure Points A and D are maintained at temperature 60 C and 240 C The temperature...
- Q Two rods A and B are of equal lengths Their ends are kept between the same temperature and their area of cross sections are A and A2 and thermal conductivities...
- Q Change in length of a solid when it is heated depends O a Change in temperature O b Neither original length nor change in temperature O c Original length and...
- Q If the temperature difference on the two sides of a wall increases from 100 C to 200 C its thermal conductivity MP PMT 2006 Remains unchanged Is doubled Is halved...
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