1
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

Two protons are kept at a separation of 40 $$\mathop A\limits^o $$. F$$_n$$ is the nuclear force and F$$_e$$ is the electrostatic force between them. Then,

A
$$F_n< < F_e$$
B
$$F_n\approx F_e$$
C
$$F_n> > F_e$$
D
$$F_n= F_e$$
2
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

Two radioactive materials X$$_1$$ and X$$_2$$ have decay constant 5$$\lambda$$ and $$\lambda$$, respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X$$_1$$ to X$$_2$$ will be $$1/e$$ after a time

A
$$1/4\lambda$$
B
$$e/\lambda$$
C
$$\lambda$$
D
$$\frac{1}{2}\lambda$$
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