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(a) 5g/14
(d) The angular acceleration is non-zero and remains same.
(b) The room will be warmed up gradually
(b) 90 J
(c) 0.577
(d) e = 0.15
(a) 3/2
(c) Diatomic
(c) –2767.23 J
(b) 189 K
An inclined plane makes on angle of 30° with horizontal. A solid sphere rolling down this inclined plane has a linear acceleration of
(a) 5g/14
(a) 5g/14
See lessWhen a disc rotates with uniform angular velocity, which of the following is not true?
(d) The angular acceleration is non-zero and remains same.
(d) The angular acceleration is non-zero and remains same.
See lessThe door of a running refrigerator inside a room is left open. The correct statement out of the following ones is
(b) The room will be warmed up gradually
(b) The room will be warmed up gradually
See lessA Carnot engine, having an efficiency of η = 1/10 as heat engine is used as a refrigerator. If the work done on the system is 10J the amount of energy absorbed from the reservoir at lower temperature is
(b) 90 J
(b) 90 J
See lessThe efficiency of engine is η₁ at T₁ = 200°C and T1 = 0°C and η₂ at T1= 0°C and T₂ –200 K. Find the ratio of 1
(c) 0.577
(c) 0.577
See lessA body at a temperature of 728°C and having surface area 5 cm2, radiates 300 J of energy each minute. The emissivity is [Given Boltzmann constant : =5.67×10–8 Wm–2 K–4]
(d) e = 0.15
(d) e = 0.15
See lessDuring an adiabatic process, the increase of a gas is found to be proportional to the cube of its temperature. The ratio of Cp/Cv for the gas is
(a) 3/2
(a) 3/2
See lessThe work of 146 KJ is performed in order to compress one kilomole of a gas adiabatically, and in this process, the temperature of the gas increase by 7°C. The gas is
(c) Diatomic
(c) Diatomic
See lessIn the above question, change in internal energy of the gas is
(c) –2767.23 J
(c) –2767.23 J
See lessAt 27°C two moles of an ideal mono-atomic gas occupy a volume V. The gas expands adiabatically to a volume 2V. The final temperature of the gas is [Takey=5/3]
(b) 189 K
(b) 189 K
See less