1
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The velocity of a particle is v = v0 + gt + Ft2. Its position is x = 0 at t = 0; then its displacement after time (t = 1) is :
A
v0 + g + f
B
v0 + $${g \over 2}$$ + $${F \over 3}$$
C
v0 + 2g + 3F
D
v0 + $${g \over 2}$$ + F
2
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
A block of mass 1 kg attached to a spring is made to oscillate with an initial amplitude of 12 cm. After 2 minutes the amplitude decreases to 6 cm. Determine the value of the damping constant for this motion . (take ln 2 = 0.693)
A
0.69 $$\times$$ 102 kg s$$-$$1
B
3.3 $$\times$$ 102 kg s$$-$$1
C
1.16 $$\times$$ 10$$-$$2 kg s$$-$$1
D
5.7 $$\times$$ 10$$-$$3 kg s$$-$$1
3
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
A rubber ball is released from a height of 5 m above the floor. It bounces back repeatedly, always rising to $${{81} \over {100}}$$ of the height through which it falls. Find the average speed of the ball. (Take g = 10 ms$$-$$2)
A
2.50 ms$$-$$1
B
3.0 ms$$-$$1
C
2.0 ms$$-$$1
D
3.50 ms$$-$$1
4
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The four arms of a Wheatstone bridge have resistances as shown in the figure. A galvanometer of 15$$\Omega$$ resistance is connected across BD. Calculate the current through the galvanometer when a potential difference of 10V is maintained across AC.

JEE Main 2021 (Online) 17th March Evening Shift Physics - Current Electricity Question 159 English
A
4.87 $$\mu$$A
B
4.87 mA
C
2.44 mA
D
2.44 $$\mu$$A
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