1
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

Three charges, each of $+4 \mu \mathrm{C}$, are placed at the corners $A, B, C$ of a square $A B C D$ of side 1 m . What is the magnitude (in $\mathrm{NC}^{-1}$ ) of electric field at point $O$ towards point $D$ ?

A
66000
B
72000
C
51000
D
64000
2
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

36 cells each of internal resistance $0.5 \Omega$ and emf 1.5 V each are used to send current through an external circuit of $2 \Omega$ resistor. For getting maximum current, $n$ cells are combined in series in each row. If total number of such rows are $m$, then the value of $(n / m)$ will be

A
4
B
6
C
8
D
3
3
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

The magnetic field in a electromagnetic wave is given by

$$B_y=2 \times 10^{-7} \sin \left(0.5+10^3 x+1.5 \times 10^{11} t\right) \mathrm{T}$$

The frequency of the wave is (in GHz)

A
1.26 GHz
B
2.39 GHz
C
12.6 GHz
D
23.9 GHz
4
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

An electromagnetic wave with poynting vector $6 \mathrm{Wm}^{-2}$ is absorbed by a surface area $12 \mathrm{~m}^2$. The force on the surface is

A
$24 \times 10^{-8} \mathrm{~N}$
B
$30 \times 10^{-5} \mathrm{M}$
C
$2.4 \times 10^{-12} \mathrm{~N}$
D
$3.6 \times 10^8 \mathrm{M}$
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