41- What are the processes involved in Carnot cycle?
(A) isothermal and adiabatic expansion and isothermal and adiabatic compression
(B) isothermal and adiabatic compression
(C) isothermal and adiabatic expansion
(D) isothermal expansion and adiabatic compression
42- If the Lissajous figure obtained. by a combination of two simple harmonic motions is an ellipse, then the motions are
(A) parallel to each other
(B) at right angles to each other
(C) 180° out of phase
(D) with different frequencies
43- The mean value of solar constant is
(A) 5987 K
(B) 1.94 cals/cm2 minute
(C) 5730 K
(D) 6928 K
44- An oscillatory motion is said to be simple harmonic due to an inter action between ___ and ___
(A) potential and energy
(B) energy and elasticity
(C) inertia and elasticity
(D) inertia and potential
45- The role of varying magnetic field, in the perpendicular direction of electron orbit in a betatron is
(A) to move electron-outwards
(B) to move electron inwards
(C) to move electron in circular trajectory
(D) to move electron in straight line
46- When sound waves travel from one medium to another, the quantity that remains unchanged is
(A) speed
(B) frequency
(C) intensity
(D) wavelength
47- Which one of the bond in strongest bond in the crystal?
(A) Ionic bond
(B) Co-valent bond
(C) Mutallic bond
(D) Hydrogen bond
48- The time of reverberation can be decreased by
(A) choosing a larger hall
(B) having number of loud speakers
(C) opening all the windows and doors
(D) speaking aloud
49- The wavelength of X-rays emitted from X-ray tube depends on the
(A) Voltage applied to the tube
(B) Distance between the target and cathode
(C) Atomic number of target material
(D) Size of the target material
50- The wavelength of ultrasonic wave is
(A) the same as that of audible sound
(B) very low
(C) more than that of audible sound
(D) very high
ANSWERS:
41-(A), 42-(B), 43-(B), 44-(C), 45-(C), 46-(B), 47-(A), 48-(C), 49-(C), 50-(B)