1
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
In a p-n junction diode, change in temperature due to heating
A
affects only reverse resistance
B
affects only forward resistance
C
does not affect resistance of p-n junction
D
affects the overall V - I characteristics of p-n junction
2
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
A
26.8%
B
20%
C
6.25%
D
12.5%
3
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one of the following statements is incorrect?
A
Rolling friction is smaller than sliding friction.
B
Limiting value of static friction is directly proportional to normal reaction.
C
Frictional force opposes the relative motion.
D
Coefficient of sliding friction has dimensions of length.
4
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest after collision. When the initial velocity of the lighter block is v, then the value of coefficient of restitution (e) will be
A
0.5
B
0.25
C
0.8
D
0.4
EXAM MAP