1
JEE Main 2021 (Online) 26th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Two blocks of masses 3 kg and 5 kg are connected by a metal wire going over a smooth pulley. The breaking stress of the metal is $${{24} \over \pi } \times {10^2}$$ Nm-2. What is the minimum radius of the wire ? (Take g = 10 ms-2)
![JEE Main 2021 (Online) 26th August Evening Shift Physics - Properties of Matter Question 142 English](https://imagex.cdn.examgoal.net/1ktemelku/1eea32a7-25c7-43d8-a54f-89ece57d5e18/b23c5de0-125a-11ec-a4fb-5347f21481c0/file-1ktemelkv.jpeg)
![JEE Main 2021 (Online) 26th August Evening Shift Physics - Properties of Matter Question 142 English](https://imagex.cdn.examgoal.net/1ktemelku/1eea32a7-25c7-43d8-a54f-89ece57d5e18/b23c5de0-125a-11ec-a4fb-5347f21481c0/file-1ktemelkv.jpeg)
2
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
+4
-1
Two waves are simultaneously passing through a string and their equations are :
y1 = A1 sin k(x $$-$$ vt), y2 = A2 sin k(x $$-$$ vt + x0). Given amplitudes A1 = 12 mm and A2 = 5 mm, x0 = 3.5 cm and wave number k = 6.28 cm$$-$$1. The amplitude of resulting wave will be ................ mm.
y1 = A1 sin k(x $$-$$ vt), y2 = A2 sin k(x $$-$$ vt + x0). Given amplitudes A1 = 12 mm and A2 = 5 mm, x0 = 3.5 cm and wave number k = 6.28 cm$$-$$1. The amplitude of resulting wave will be ................ mm.
Your input ____
3
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
+4
-1
A source of light is placed in front of a screen. Intensity of light on the screen is I. Two Polaroids P1 and P2 are so placed in between the source of light and screen that the intensity of light on screen is I/2. P2 should be rotated by an angle of (degrees) so that the intensity of light on the screen becomes $${{3I} \over 8}$$.
Your input ____
4
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
+4
-1
If the maximum value of accelerating potential provided by a ratio frequency oscillator is 12 kV. The number of revolution made by a proton in a cyclotron to achieve one sixth of the speed of light is ...............
[mp = 1.67 $$\times$$ 10$$-$$27 kg, e = 1.6 $$\times$$ 10$$-$$19C, Speed of light = 3 $$\times$$ 108 m/s]
[mp = 1.67 $$\times$$ 10$$-$$27 kg, e = 1.6 $$\times$$ 10$$-$$19C, Speed of light = 3 $$\times$$ 108 m/s]
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Total Questions
Chemistry
22
Mathematics
23
Physics
27
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