SuperCoaching AE/JE by Testbook
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A satellite orbits Earth at height R/2 (R=Earth's radius). Escape velocity from this orbit is v. Escape velocity from Earth's surface is:
Anonymous Quiz
17%
√2v
48%
2v/√3
15%
√3v
20%
v/√2
What is the derivative of 3x² + 2x?
Anonymous Quiz
14%
3x + 2
15%
6x
69%
6x + 2
2%
x³ + x²
What's the limit of (sin(x)/x) as x approaches 0?
Anonymous Quiz
12%
0
65%
1
21%
Infinity
2%
Undefined
Which complex exhibits *only* d-d transitions?
Anonymous Quiz
50%
[Cu(NH3)4(H2O)2]SO4
25%
KMnO4
23%
K2Cr2O7
2%
[Ti(H2O)6]3+
🔥Your Live Class on RRB JE Electronics Classes | RRB JE Electronics Previous Year Question Paper Solution | Atul Sir is about to start.
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- Atul Varshney
🔥Your Live Class on RRB JE Electronics Classes | RRB JE Electronics Previous Year Question Paper Solution | Atul Sir is about to start.
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- Atul Varshney
1
If f(x) = x² - 4x + 3, find the sum of roots of f(f(x)) = 0.
Anonymous Quiz
28%
4
33%
8
31%
12
8%
16
A ball is thrown upwards. At its highest point, what is its velocity?
Anonymous Quiz
28%
9.8 m/s
21%
Constant
48%
Zero
3%
Increasing
2
A ball is thrown upwards. At its highest point, what is its acceleration?
Anonymous Quiz
45%
9.8 m/s² downwards
35%
0 m/s²
16%
9.8 m/s² upwards
4%
Depends on initial velocity
A function f(x) satisfies f(x+1) = 2f(x). If f(0) = 3, what is f(3)?
Anonymous Quiz
18%
6
45%
12
35%
24
2%
48
1