1
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The magnifying power of a telescope with tube 60 cm is 5. What is the focal length of its eye piece ?
A
40 cm
B
10 cm
C
30 cm
D
20 cm
2
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A thermodynamic cycle xyzx is shown on a V-T diagram. JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 263 English The P-V diagram that best describes this cycle is :
(Diagrams are schematic and not to scale)
A
JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 263 English Option 1
B
JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 263 English Option 2
C
JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 263 English Option 3
D
JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 263 English Option 4
3
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Photon with kinetic energy of 1MeV moves from south to north. It gets an acceleration of 1012 m/s2 by an applied magnetic field (west to east). The value of magnetic field : (Rest mass of proton is 1.6 × 10–27 kg) :
A
0.71mT
B
7.1mT
C
0.071mT
D
71mT
4
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The plot that depicts the behavior of the mean free time t (time between two successive collisions) for the molecules of an ideal gas, as a function of temperature (T), qualitatively, is:
(Graphs are schematic and not drawn to scale)
A
JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 264 English Option 1
B
JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 264 English Option 2
C
JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 264 English Option 3
D
JEE Main 2020 (Online) 8th January Morning Slot Physics - Heat and Thermodynamics Question 264 English Option 4
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