1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
In the middle of the depletion layer of a reverse- biased $$p$$-$$n$$ junction, the
A
electric field is zero
B
potential is maximum
C
electric field is maximum
D
potential is zero
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Two identical photo-cathodes receive light of frequencies $${f_1}$$ and $${f_2}$$. If the velocities of the photo electrons (of mass $$m$$ ) coming out are respectively $${v_1}$$ and $${v_2},$$ then
A
$$v_1^2 - v_2^2 = {{2h} \over m}\left( {{f_1} - {f_2}} \right)$$
B
$${v_1} + {v_2} = {\left[ {{{2h} \over m}\left( {{f_1} + {f_2}} \right)} \right]^{1/2}}$$
C
$$v_1^2 + v_2^2 = {{2h} \over m}\left( {{f_1} + {f_2}} \right)$$
D
$${v_1} - {v_2} = {\left[ {{{2h} \over m}\left( {{f_1} - {f_2}} \right)} \right]^{1/2}}$$
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
If the binding energy of the electron in a hydrogen atom is $$13.6eV,$$ the energy required to remove the electron from the first excited state of $$L{i^{ + + }}$$ is
A
$$30.6$$ $$eV$$
B
$$13.6$$ $$eV$$
C
$$3.4$$ $$eV$$
D
$$122.4$$ $$eV$$
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
In an oscillating $$LC$$ circuit the maximum charge on the capacitor is $$Q$$. The charge on the capacitor when the energy is stored equally between the electric and magnetic field is
A
$${Q \over 2}$$
B
$${Q \over {\sqrt 3 }}$$
C
$${Q \over {\sqrt 2 }}$$
D
$$Q$$
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