NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Gravitation
NEET · Physics · Gravitation
A satellite is in a circular equatorial orbit of radius 7000 km...
A satellite is in a circular equatorial orbit of radius 7000 km around the earth. If it is transferred to a circular orbit of double of radius :-
(
)
| Column 1 | Column 2 | ||
| (A) | Angular momentum | (P) | Increases |
| (B) | Area of earth covered | (Q) | Decreases |
| by satellite signal | |||
| (C) | Potential energy | (R) | Becomes double |
| (D) | Kinetic energy | (S) | Becomes half |
Options
- A(A) (\rightarrow) Q; (B) (\rightarrow) P; (C) (\rightarrow) P, R; (D) (\rightarrow) Q, S
- B(A) (\rightarrow) P; (B) (\rightarrow) P; (C) (\rightarrow) P; (D) (\rightarrow) Q, S
- C(A) (\rightarrow) Q; (B) (\rightarrow) Q; (C) (\rightarrow) P, S; (D) (\rightarrow) P, R
- D(A) (\rightarrow) P; (B) (\rightarrow) Q; (C) (\rightarrow) P; (D) (\rightarrow) P, R
Correct answer
B. (A) (\rightarrow) P; (B) (\rightarrow) P; (C) (\rightarrow) P; (D) (\rightarrow) Q, S
Step-by-step solution
(r \rightarrow 2 r)
(A) Angular Momentum : (=\mathrm{m} \sqrt{\frac{\mathrm{GM}}{\mathrm{r}}}). r
(\mathrm{L} \propto \sqrt{\mathrm{r}} \quad \mathrm{r} \uparrow \Rightarrow \mathrm{L} \uparrow)
(B)
Area covered will (\uparrow) (C) (\mathrm{U}=-\frac{\mathrm{GMm}}{\mathrm{r}}=-\mathrm{U}_0) (\mathrm{U}^{\prime}=-\frac{\mathrm{GMm}}{2 \mathrm{r}}=-\left(\frac{\mathrm{U}_0}{2}\right)) P.E. will (\uparrow) (D) (\mathrm{KE}=\frac{\mathrm{GMm}}{2 \mathrm{r}} \Rightarrow \mathrm{KE}) will (\downarrow)
Area covered will (\uparrow) (C) (\mathrm{U}=-\frac{\mathrm{GMm}}{\mathrm{r}}=-\mathrm{U}_0) (\mathrm{U}^{\prime}=-\frac{\mathrm{GMm}}{2 \mathrm{r}}=-\left(\frac{\mathrm{U}_0}{2}\right)) P.E. will (\uparrow) (D) (\mathrm{KE}=\frac{\mathrm{GMm}}{2 \mathrm{r}} \Rightarrow \mathrm{KE}) will (\downarrow)