A convex lens of focal length 20 cm forms an image at 40 cm from the lens. What is the object distance?

The direction of a magnetic field around a current-carrying conductor is given by?

What is the freezing point of water in Celsius?

What physical quantity is measured in decibels (dB)?

According to Ohm’s Law, what is the relationship between voltage (V), current (I), and resistance (R)?

State Newton’s First Law of Motion with an example.

Which type of lens is used to correct myopia (short-sightedness)?

Which law of thermodynamics states that energy cannot be created or destroyed?

Sound cannot travel through which of the following?

According to Ohm’s law, V = ?

Who formulated the three laws of motion?

In the context of SSC (Staff Selection Commission) exams or general physics, explain what the angle of reflection is and how it relates to the angle of incidence as per the laws of reflection.k

Formula:

$\theta_r = \theta_i$

Where:

• $\theta_r$ = angle of reflection
• $\theta_i$ = angle of incidence

What is the angle of reflection?

In the context of SSC (Staff Selection Commission) exams or general physics, explain what the angle of reflection is and how it relates to the angle of incidence as per the laws of reflection.k

Formula:

$\theta_r = \theta_i$

Where:

• $\theta_r$ = angle of reflection
• $\theta_i$ = angle of incidence