JEE Advanced

1. For calculating the time of flight in projectile motion, remember the equation:

$$Time=\frac{2(FinalVelocity+IntialVelocity)\times \sin \theta }{g}$$

2. For quick calculation of the angle in projectile motion, just add 45° with half of the given angle.

3. When given the equation of the trajectory, the horizontal range is given by $$R=\frac{u^2\sin 2\theta }{g}$$

4. For quick calculations of the maximum height

$$H=\frac{u^2{\sin }^2\theta }{2g}$$

5. For easy estimation in a potentiometer experiment, remember that at the balancing point $$Length=\frac{e.m.fofCell}{PotentialGradient}$$

6. For quick calculations of the drift velocity in a conductor $$v_d=\frac{ne\mu E}{m}$$

7. To find the angle between the magnetic field and the current carrying conductor for maximum magnetic force, just remember

$$B\perp I\Rightarrow \theta =90\text{degree}$$

8. For easy calculations of the magnetic force on a moving charge, remember the formula

$$F=q(v\times B)\sin \theta$$

9. To find the frequency of revolution of a charged particle in a magnetic field, remember the equation:

$$f=\frac{qB}{2\pi m}$$

10. For quick calculations of the electric potential due to a point charge

$$V=\frac{1}{4\pi {ϵ}_0}\cdot \frac{Q}{r}$$

11. To find the energy stored in a capacitor, just remember the equation:

$$E=\frac{1}{2}C{V}^2$$

12. To find the reactance of an inductor, use the formula:

$$X_L=2\pi fL$$

13. To recall the equation for the capacitive reactance, remember the equation:

$$X_C=\frac{1}{2\pi fC}$$

CBSE Board Exams

1. For calculating the time of flight in projectile motion, remember the equation:

$$Time=\frac{2(FinalVelocity+IntialVelocity)\times \sin \theta }{g}$$

2. For quick calculation of the angle in projectile motion, just add 45° with half of the given angle.

3. When given the equation of the trajectory, the horizontal range is given by $$R=\frac{u^2\sin 2\theta }{g}$$

4. For quick calculations of the maximum height

$$H=\frac{u^2{\sin }^2\theta }{2g}$$

5. For easy estimation in a potentiometer experiment, remember that at the balancing point

$$Length=\frac{e.m.fofCell}{PotentialGradient}$$

6. To find the magnetic force on a current carrying conductor, just remember the formula:

$$F=BIL\sin \theta$$

7. For quick calculations of the electric potential due to a point charge

$$V=\frac{1}{4\pi {ϵ}_0}\cdot \frac{Q}{r}$$

**8.**To find the energy stored in a capacitor, remember the equation:

$$E=\frac{1}{2}C{V}^2$$

9. To find the reactance of an inductor, use the formula:

$$X_L=2\pi fL$$

10. To recall the equation for the capacitive reactance, remember the equation: $$X_C=\frac{1}{2\pi fC}$$