1
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For a transverse wave travelling along a straight line, the distance between two peaks (crests) is 5 m, while the distance between one crest and one trough is 1.5 m. The possible wavelengths (in m) of the are :
A
1, 3, 5, .....
B
$${1 \over 1},{1 \over 3},{1 \over 5},$$ .....
C
1, 2, 3, .....
D
$${1 \over 2},{1 \over 4},{1 \over 6},$$
2
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is :
A
0.50 W
B
0.072 W
C
0.10 W
D
0.125 W
3
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A two point charges 4q and -q are fixed on the x-axis at x = $$ - {d \over 2}$$ and x = $${d \over 2}$$ respectively. If a third point charge 'q' is taken from the origin to x = d along the semicircle as shown in the figure, the energy of the charge will : JEE Main 2020 (Online) 4th September Morning Slot Physics - Electrostatics Question 174 English
A
increase by $${{3{q^2}} \over {4\pi {\varepsilon _0}d}}$$
B
increase by $${{2{q^2}} \over {3\pi {\varepsilon _0}d}}$$
C
decrease by $${{{q^2}} \over {4\pi {\varepsilon _0}d}}$$
D
decrease by $${{4{q^2}} \over {3\pi {\varepsilon _0}d}}$$
4
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A air bubble of radius 1 cm in water has an upward acceleration 9.8 cm s–2. The density of water is 1 gm cm–3 and water offers negligible drag force on the bubble. The mass of the bubble is (g = 980 cm/s2).
A
1.52 gm
B
4.51 gm
C
3.15 gm
D
4.15 gm
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