1
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
An electron accelerated through a potential difference $V_{1}$ has a de-Broglie wavelength of $\lambda$. When the potential is changed to $V_{2}$, its de-Broglie wavelength increases by $50 \%$. The value of $\left(\frac{V_{1}}{V_{2}}\right)$ is equal to
A
$\frac{3}{2}$
B
4
C
3
D
$\frac{9}{4}$
2
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
A machine gun of mass $10 \mathrm{~kg}$ fires $20 \mathrm{~g}$ bullets at the rate of 180 bullets per minute with a speed of $100 \mathrm{~m} \mathrm{~s}^{-1}$ each. The recoil velocity of the gun is
A
$ 0.02 \mathrm{~m} / \mathrm{s}$
B
$1.5 \mathrm{~m} / \mathrm{s}$
C
$2.5 \mathrm{~m} / \mathrm{s}$
D
$0.6 \mathrm{~m} / \mathrm{s}$
3
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The equivalent resistance between $A$ and $B$ is _________.

JEE Main 2023 (Online) 30th January Evening Shift Physics - Current Electricity Question 40 English
A
$\frac{1}{2} \Omega$
B
$\frac{2}{3} \Omega$
C
$\frac{3}{2} \Omega$
D
$\frac{1}{3} \Omega$
4
JEE Main 2023 (Online) 30th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Match List I with List II:

List I List II
A. Attenuation I. Combination of a receiver and transmitter.
B. Transducer II. process of retrieval of information from the carrier wave at receiver
C. Demodulation III. converts one form of energy into another
D. quad Repeater IV. Loss of strength of a signal while propagating through a medium.

Choose the correct answer from the options given below:

A
A-I, B-II, C-III, D-IV
B
A-IV, B-III, C-I, D-II
C
A-IV, B-III, C-II, D-I
D
A-II, B-III, C-IV, D-I
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