1
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

$$\lim _\limits{n \rightarrow \infty}\left(\frac{(n+1)(n+2) \ldots 3 n}{n^{2 n}}\right)^{1 / n}$$ is equal to

A
$$\frac{18}{e^4}$$
B
$$\frac{27}{e^2}$$
C
$$\frac{9}{e^2}$$
D
$$3 \log 3-2$$
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

Let $$a, b$$ and $$c$$ be three unit vectors such that $$a \times(b \times c)=\frac{\sqrt{3}}{2}(b+c)$$. If $$b$$ is not parallel to $$c$$, then the angle between $$a$$ and $$b$$ is

A
$$\frac{3 \pi}{4}$$
B
$$\frac{\pi}{2}$$
C
$$\frac{2 \pi}{3}$$
D
$$\frac{5 \pi}{6}$$
3
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The upper end of a wire of diameter $$24 \mathrm{~mm}$$ and length $$1 \mathrm{~m}$$ is damped and its other end is twisted through an angle is $$30^{\circ}$$. The angle of shear is

A
$$18^{\circ}$$
B
$$0.18^{\circ}$$
C
$$36^{\circ}$$
D
$$0.36^{\circ}$$
4
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

What is the voltage gain in a common emitter amplifier, where input resistance is $$6 \Omega$$ and load resistance $$48 \Omega, \beta=0.3$$ ?

A
8.4
B
4.8
C
2.4
D
480
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