1
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The positive feedback is required by an amplifier to act an oscillator. The feedback here means :

A
External input is necessary to sustain ac signal in output.
B
A portion of the output power is returned back to the input.
C
Feedback can be achieved by LR network.
D
The base-collector junction must be forward biased.
2
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

A sinusoidal wave y(t) = 40sin(10 $$\times$$ 106 $$\pi$$t) is amplitude modulated by another sinusoidal wave x(t) = 20sin (1000 $$\pi$$t). The amplitude of minimum frequency component of modulated signal is :

A
0.5
B
0.25
C
20
D
10
3
JEE Main 2022 (Online) 26th June Evening Shift
Numerical
+4
-1
Change Language

A ball is projected vertically upward with an initial velocity of 50 ms$$-$$1 at t = 0s. At t = 2s, another ball is projected vertically upward with same velocity. At t = __________ s, second ball will meet the first ball (g = 10 ms$$-$$2).

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4
JEE Main 2022 (Online) 26th June Evening Shift
Numerical
+4
-1
Change Language

A batsman hits back a ball of mass 0.4 kg straight in the direction of the bowler without changing its initial speed of 15 ms$$-$$1. The impulse imparted to the ball is ___________ Ns.

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