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
A block of mass m is placed on a smooth inclined wedge ABC of inclination q as shown in the figure. The wedge is given an acceleration ‘a’ towards the right. The relation between a and q for the block to remain stationary on the wedge is NEET 2018 Physics - Laws of Motion Question 14 English
A
$$a = {g \over {\cos ec\theta }}$$
B
$$a = {g \over {\cos ec\theta }}$$
C
$$a = g\cos \theta $$
D
$$a = g\tan \theta $$
3
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
A
13.2 cm
B
8 cm
C
12.5 cm
D
16 cm
4
NEET 2018
MCQ (Single Correct Answer)
+4
-1
Change Language
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of –0.004 cm, the correct diameter of the ball is
A
0.521 cm
B
0.525 cm
C
0.053 cm
D
0.529 cm