1
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

The masses of an electron, a proton and a neutron respectively will be n the ratio

A
1 : 1836.15 : 1838.68
B
1 : 1856.15 : 1858.68
C
1 : 1834.15 : 1836.68
D
1 : 1846.15 : 1848.68
2
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

Match the following species with the correct number of electrons present in them.

Species Number of electrons
A. Be$$^{2+}$$ (i) 0
B. H$$^+$$ (ii) 10
C. Na$$^+$$ (iii) 2
D. Mg$$^+$$ (iv) 11
(v) 4

A
A - (iv), B - (iii), C - (ii), D - (i)
B
A - (i), B - (ii), C - (iii), D - (iv)
C
A - (v), B - (iv), C - (i), D - (iii)
D
A - (iii), B - (i), C - (ii), D - (iv)
3
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

Assuming that the incident radiation is capable of ejecting photoelectrons from all the given metals, the lowest kinetic energy of the ejected photoelectron is observed with which of the given metals?

A
Na
B
Li
C
Ag
D
Cu
4
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the energies of two light radiations $$E_1$$ and $$E_2$$ are $$25 \mathrm{~eV}$$ and $$100 \mathrm{~eV}$$ respectively, then their respective wavelengths $$\lambda_1$$ and $$\lambda_2$$ would be in the ratio $$\lambda_1: \lambda_2$$

A
2 : 1
B
4 : 1
C
1 : 4
D
1 : 2
AP EAPCET Subjects
EXAM MAP