1
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The total energy of an electron in the second excited state of hydrogen atom is about $$-1.51 \mathrm{~eV}$$. Its kinetic energy in this state is

A
$$-1.5 \mathrm{~eV}$$
B
$$-3.02 \mathrm{~eV}$$
C
3.02 eV
D
1.51 eV
2
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The masses of block $$A$$ and $$B$$ are $$m$$ and $$M$$, respectively. Between $$A$$ and $$B$$, there is a constant frictional force $$F$$ and $$B$$ can slide on a smooth horizontal surface. A is set in motion with velocity $$3 v_0$$ while $$B$$ is at rest. What is the distance moved by $$A$$ relative to $$B$$ before they move with the same velocity?

BITSAT 2023 Physics - Laws of Motion Question 1 English

A
$$\frac{m M v_0^2}{F(m-M)}$$
B
$$\frac{M v_0^2}{18 F(m-M)}$$
C
$$\frac{m M v_0^2}{9 F(m+M)}$$
D
$$\frac{9 m M v_0^2}{2 F(m+M)}$$
3
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

Magnetic moment of bar magnet is $$2 M$$. The work done to turn the magnet by $$90^{\circ}$$ of magnet in direction of magnetic field $$B / 2$$ will be

A
zero
B
$$\frac{M B}{2}$$
C
2MB
D
MB
4
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The wavelength of two waves are 40 and $$42 \mathrm{~cm}$$ respectively. If the temperature of the room is $$20^{\circ} \mathrm{C}$$ then what will be the number of beats produced per second by these waves. When the speed of sound at $$0^{\circ} \mathrm{C}$$ is $$332 \mathrm{~m} / \mathrm{s}$$ ?

A
34
B
38
C
44
D
None of these
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