Practice/Question bank/JEE Main
JEE Main practice questions
NTA-style Physics, Chemistry and Maths MCQs with solutions. 2,688 questions in the bank.
- 1A mass supported by a massless string wound around a uniform hollow cylinder of mass m and radius R. If the string does not slip on the…Physics· Rigid Body Dynamics· Easy· figure
- 2Find momentum of inertia about an axis passing through COM of system and it is perpendicular to theplane of 3 rods.Physics· Rigid Body Dynamics· Moderate· figure
- 3Two men of equal masses stand at opposite ends of the diameter of a turntable disc of a certain mass, moving with some angular velocity.…Physics· Rigid Body Dynamics· Moderate
- 4A uniform metre stick is held vertically with one end on the floor and is allowed to fall. The speed of theother end when it hits the floor…Physics· Rigid Body Dynamics· Moderate
- 5A monoatomic ideal gas follows the process: TV^3/2 = constant The molar specific heat for this process is: (R = gas constant).Physics· Thermodynamics· Moderate
- 6An ideal gas whose internal energy U is at absolute zero temperature is equal to zero undergoes areversible adiabatic compression. If U, P,…Physics· Thermodynamics· Moderate
- 7P- V diagram of ideal monoatomic gas is as shown. Find net heat given to the gas in the process ABC.$\ $Physics· Thermodynamics· Moderate· figure
- 8V - T diagram for a process of a given mass of ideal gas is as shown in the figure. During the process pressure of gas.Physics· Thermodynamics· Moderate· figure
- 9For an adiabatic process graph between PV&V for a sample of ideal gas will bePhysics· Thermodynamics· Moderate
- 10When a gas in a vessel expands, its internal energy decreases. The process involved isPhysics· Thermodynamics· Moderate
- 11Temperature of 100 g of water in a thermoflaskremains fixed for a pretty long time at 50ºC. Anequal mass of sand at 20ºC is poured in the…Physics· Heat· Tough
- 12The internal energy of a system in adiabatic expansionPhysics· Thermodynamics· Easy
- 13Power radiated by a black body is P_0 and the wavelength corresponding to the maximum energyis around$\lambda_{0}$. On changing the…Physics· Heat· Tough
- 14110 J of heat are added to a gaseous system where change in internal energy is 40 J, then the amount of external work done isPhysics· Thermodynamics· Easy
- 15The expansion of unit mass of an ideal gas atconstant pressure is show in the diagram. HerePhysics· Thermodynamics· Moderate· figure
- 16Two moles of hydrogen are mixed with n moles of helium. The root mean square speed of gas molecules in the mixture is $\sqrt{2}$ times the…Physics· Kinetic Theory of Gases· Moderate
- 17When 300 J of heat is added to 25 gm of sampleof a material its temperature rises from 25ºC to45ºC. The thermal capacity of the sample…Physics· Heat· Moderate
- 18Three metal rods of the same material an identicalin all respects are joined as shown in the figure. The temperatures at the ends are…Physics· Heat· Moderate· figure
- 19A ring shaped tube contains two ideal gases with equal masses and atomic mass numbers M_1=32 and M_2=28. The gases are separated by one…Physics· Kinetic Theory of Gases· Tough· figure
- 20An ideal gas obeys the law $PV^{x} =$ constant. x is value for which it has zero molar specific heat at normal temperature. Then find 5 x.…Physics· Thermodynamics· Moderate
- 21An engine has an efficiency of 0.25 when temperature of sink is reduced by58ºC, if ts efficiency is doubled, then the temperature of the…Physics· Thermodynamics· Moderate
- 22Figure shows the variation of internal energy "U" with the density "$\rho$ " of one mole of ideal diatomic gas. Process BA is a part of…Physics· Thermodynamics· tough· figure
- 23$\ $Figure below shows two paths that may be taken by a gas to go from a state A to a state C. [IMAGE] In process AB, 400J of heat is added…Physics· Thermodynamics· Moderate· figure
- 24A system undergoes three quasi-static processes sequentially as indicated in the given figure. $1 \rightarrow 2$is an isobaric process, $2…Physics· Thermodynamics· Tough· figure