1
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A car starts from Bengaluru, goes 50 km in a straight line towards South, immediately turns around and returns to Bengaluru. The time taken for this round trip is 2h. The magnitude of the average velocity of the car for this round trip
A
is zero
B
is 50 km/h
C
is 25 km/h
D
cannot be calculated without knowing accelration
2
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
"The sum of emf's and potential differences around a closed loop equals zero" is a consequence of
A
Ohm's law
B
conservation of chrage
C
conservation of momentum
D
conservation of energy
3
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A student measures certain lengths using a meter scale having least count equal to 1 mm. Which one of the following measurement is more precise?
A
0.50 mm
B
29.07 mm
C
0.925 mm
D
910 mm
4
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If the work done on the system or by the system is zero, then which one of the following statement for a gas kept at a certain temperature is correct?
A
Change in internal energy of the system is equal to flow of the hat in or out of the system.
B
Change in internal energy of the system is less than heat transferred.
C
Change in internal energy of the system is more than the heat flow.
D
Cannot be detrmined.
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