1
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
If the straight lines $$\,\,\,\,\,$$ $$\,\,\,\,\,$$ $${{x - 1} \over k} = {{y - 2} \over 2} = {{z - 3} \over 3}$$ $$\,\,\,\,\,$$ and$$\,\,\,\,\,$$ $${{x - 2} \over 3} = {{y - 3} \over k} = {{z - 1} \over 2}$$ intersects at a point, then the integer $$k$$ is equal to
A
$$-5$$
B
$$5$$
C
$$2$$
D
$$-2$$
2
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
The line passing through the points $$(5,1,a)$$ and $$(3, b, 1)$$ crosses the $$yz$$-plane at the point $$\left( {0,{{17} \over 2}, - {{ - 13} \over 2}} \right)$$ . Then
A
$$a=2,$$ $$b=8$$
B
$$a=4,$$ $$b=6$$
C
$$a=6,$$ $$b=4$$
D
$$a=8,$$ $$b=2$$
3
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
In the circuit below, $$A$$ and $$B$$ represent two inputs and $$C$$ represents the output. AIEEE 2008 Physics - Semiconductor Question 196 English

The circuit represents

A
NOR gate
B
AND gate
C
NAND gate
D
OR gate
4
AIEEE 2008
MCQ (Single Correct Answer)
+4
-1
Suppose an electron is attracted towards the origin by a force $${k \over r}$$ where $$'k'$$ is a constant and $$'r'$$ is the distance of the electron from the origin. By applying Bohr model to this system, the radius of the $${n^{th}}$$ orbital of the electron is found to be $$'{r_n}'$$ and the kinetic energy of the electron to be $$'{T_n}'.$$

Then which of the following is true?

A
$${T_n} \propto {1 \over {{n^2}}},{r_n} \propto {n^2}$$
B
$${T_n}$$ independent of $$n,{r_n} \propto n$$
C
$${T_n} \propto {1 \over n},{r_n} \propto n$$
D
$${T_n} \propto {1 \over n},{r_n} \propto {n^2}$$
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