NSO Class 12 Mock Test 2026 – Set 2

Sample 1, Logical Reasoning

An electron enters a uniform magnetic field $B$ with a velocity $v$ perpendicular to the field. What is the time period of the circular motion of the electron?

1. A. $\frac{2\pi m}{eB}$
2. B. $\frac{2\pi e}{mB}$
3. C. $\frac{2\pi mB}{e}$
4. D. $\frac{eB}{2\pi m}$

Sample 2, Physics

Which of the following electromagnetic waves has the highest frequency?

1. A. Microwaves
2. B. Ultraviolet rays
3. C. X-rays
4. D. Gamma rays

Sample 3, Chemistry

Which of the following coordination entities is expected to exhibit the maximum paramagnetic behavior based on Crystal Field Theory? (Atomic numbers: $Mn=25, Fe=26, Co=27$)

1. A. [Fe(CN)6]3-
2. B. [Mn(H2O)6]2+
3. C. [Co(F)6]3-
4. D. [Fe(H2O)6]2+