1
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Let $c_1: x^2+y^2=1$ and $c_2:(x-10)^2+y^2=9$ be two circles a line touching $c_1$ at $P$ and $c_2$ at $Q$. If $M$ is the mid-point of $P Q$, then $M$ lies on a circle $(x-5)^2+y^2=r^2$ where ' $r$ ' is $(r>0)$

A

$\sqrt{3}$

B

$3 / 2$

C

2

D

3

2
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

$S_n=1 \cdot 3+2 \cdot 2^2+3 \cdot 3^3+4 \cdot 2^4+\ldots \ldots \ldots$ upto $n$ terms. If $S_{20}=a \cdot 3^{21}+b \cdot 2^{22}+\frac{391}{288}$, then value of $32 a-9 b$ is

A

21

B

13

C

17

D

29

3
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Three electric bulbs of 200 W and 400 W are shown in figure. The resultant power of the combination, if rated voltage is applied across the combination is

VITEEE 2025 Physics - Current Electricity Question 1 English
A

800 W

B

400 W

C

200 W

D

600 W

4
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

In hydrogen atom, an electron is revolving in the orbit of radius $0.53 \mathop {\rm{A}}\limits^{\rm{o}} $ with $6.6 \times 10^{15} \mathrm{rps}$. Magnetic field produced at the centre of the orbit is

A

$0.125 \mathrm{~Wb} / \mathrm{m}^2$

B

$1.25 \mathrm{~Wb} / \mathrm{m}^2$

C

$12.5 \mathrm{~Wb} / \mathrm{m}^2$

D

$125 \mathrm{~Wb} / \mathrm{m}^2$

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