Explanation

If the third bulb is connected in series with bulbs A and B, the total resistance in the circuit will increase. As a result, the current flowing through the circuit will decrease, leading to a decrease in the brightness of all bulbs.

Explanation

To calculate the focal length of a lens, you can use the formula: P = 1/f

Given that the power of the lens is 10 diopters, we can rearrange the formula to solve for the focal length:

f= 1/p

f= 1/10

f= 0.1m

Since 1 meter = 100 cm, the focal length in centimeters is 0.1m × 100 cm/m= 10cm.

Explanation

The Twin Paradox is a consequence of time dilation in special relativity.

Explanation

Focus is the point where the parallel beam of light rays originating from a point on the object converges.

Explanation

In the diffraction pattern of a single slit, the central maximum or the center is usually bright.

Explanation

 Andre-Marie Ampere discovered that a current-carrying conductor experiences a force when placed in a magnetic field.

This forms the basis of electromagnetism and is the principle behind electric motors.

Explanation

The electromagnetic spectrum in order of increasing frequency (and energy) is:

1. Radio waves (lowest frequency)

2. Infrared (i)

3. Visible light (v)

4. Ultraviolet (u)

5. X-rays (x) (highest frequency among these)

So, the correct sequence from lowest to highest frequency is:
radio (r) < infrared (i) < visible (v) < ultraviolet (u) < x-rays (x)

Explanation

“Elaborate with examples, the first law of motion” indicates comprehension.

Explanation

The range of a projectile is maximized when sin2𝜃 = 1.

It occurs at an angle of 45∘ since 

sin90∘ = 1.

Explanation

Coulomb's Law states that the magnitude of the electrostatic force (F) between two point charges (q1 and q2) is directly proportional to the product of the charges and inversely proportional to the square of the distance (r) between them.

Mathematically, this is expressed as: F ∝ (q1 × q2) / r².

This law describes the relationship between electric charges and the force they exert on each other.