1
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In thermodynamics, for an isochoric process, which one of the following statement is INCORRECT?

A
Energy exchanged is used to do work and also to change internal energy.
B
No work is done in the process.
C
It is a constant volume process.
D
Temperature of the system changes during the process.
2
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of energy required to raise a satellite of mass '$$m$$' to height '$$h$$' above the earth's surface to that required to put it into the orbit at same height is [ $$\mathrm{R}=$$ radius of earth]

A
$$\frac{h}{R}$$
B
$$\frac{2 h}{\mathrm{R}^2}$$
C
$$\frac{3 \mathrm{~h}}{\mathrm{R}^2}$$
D
$$\frac{2 \mathrm{~h}}{\mathrm{R}}$$
3
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

When a piece of polythene is rubbed with wool, a negative charge of $$4 \times 10^{-7} \mathrm{C}$$ is developed on the polythene. The number of electrons transferred from wool to polythene is $$[e=1.6 \times\left.10^{-19} \mathrm{C}\right]$$

A
$$1.5 \times 10^{12}$$
B
$$3.5 \times 10^{13}$$
C
$$2.5 \times 10^{13}$$
D
$$2.5 \times 10^{12}$$
4
MHT CET 2021 21th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Ratio centripetal acceleration for an electron revolving in 3rd and 5th Bohr orbit of hydrogen atom is

A
425 : 18
B
625 : 81
C
125 : 27
D
221 : 36
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