1
JEE Main 2023 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The acceleration due to gravity at height $$h$$ above the earth if $$h << \mathrm{R}$$ (Radius of earth) is given by

A
$$g^{\prime}=g\left(1-\frac{2 h}{R}\right)$$
B
$$g^{\prime}=g\left(1-\frac{2 h^{2}}{R^{2}}\right)$$
C
$$g^{\prime}=g\left(1-\frac{h^{2}}{2 R^{2}}\right)$$
D
$$g^{\prime}=g\left(1-\frac{h}{2 R}\right)$$
2
JEE Main 2023 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The power radiated from a linear antenna of length $$l$$ is proportional to

(Given, $$\lambda=$$ Wavelength of wave):

A
$$\left(\frac{l}{\lambda}\right)^{2}$$
B
$$\frac{l}{\lambda^{2}}$$
C
$$\frac{l^{2}}{\lambda}$$
D
$$\frac{l}{\lambda}$$
3
JEE Main 2023 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The equivalent resistance between A and B as shown in figure is:

JEE Main 2023 (Online) 8th April Evening Shift Physics - Current Electricity Question 32 English

A
$$30 ~\mathrm{k} \Omega$$
B
$$20 ~\mathrm{k} \Omega$$
C
$$5 ~\mathrm{k} \Omega$$
D
$$10 ~\mathrm{k} \Omega$$
4
JEE Main 2023 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The waves emitted when a metal target is bombarded with high energy electrons are

A
Infrared rays
B
Radio Waves
C
Microwaves
D
X-rays
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