The path difference for the first order maximum is given by d sin θ = λ, hence the path difference is λ sin θ.

Increasing the distance between the slits (d) decreases the fringe separation, as fringe separation is inversely proportional to d.

Increasing the distance between the slits (d) decreases the fringe width, which in turn reduces the number of visible fringes on the screen.

Fringe spacing (β) is directly proportional to the distance to the screen (D). If D is doubled, the fringe spacing also doubles.

At the first minimum, the intensity is 0 due to destructive interference.

At the first minimum, the intensity is 0 due to destructive interference.

Increasing the intensity from one slit increases the overall intensity of the interference pattern.

In uniform circular motion, speed remains constant while velocity and acceleration change direction.

In a uniform electric field, the electric potential changes linearly with distance.

Equipotential surfaces are always perpendicular to electric field lines.

In a uniform electric field, the equipotential surfaces are parallel planes.

The potential difference is directly proportional to both the distance between the points and the magnitude of the electric field.

In a uniform electric field, the potential difference (V) between two points is given by V = Ed, where d is the distance between the points.

In a uniform electric field, the potential difference (V) between two points separated by a distance (d) is given by V = E × d, where E is the electric field strength.

The magnetic force is maximum when the angle between the velocity and the magnetic field is 90 degrees, as sin(90°) = 1.

Convection is not possible in a vacuum as it requires a medium (fluid) for heat transfer.

In a vacuum, light travels fastest at approximately 3 x 10^8 m/s.

The time taken for a fluid to flow through a capillary tube is directly related to its viscosity.

'A' represents the amplitude of the wave, which is the maximum displacement from the equilibrium position.

The energy of a wave is proportional to the square of its amplitude, so if the amplitude increases, the energy increases with the square of the amplitude.

The energy carried by a wave is proportional to the square of its amplitude, so if the amplitude increases, the energy increases with the square of that increase.

The energy of a wave is proportional to the square of its amplitude. Therefore, if the amplitude increases, the energy increases.

The distance between two consecutive crests in a wave is called the wavelength.

When all resistances are equal, the bridge is balanced regardless of the configuration.

Changing one resistor can either balance or unbalance the bridge depending on the new value relative to the others.

Using the balance condition P/Q = R/S, we find S = 15Ω.

Using the balance condition R1/R2 = R3/R4, we find R4 = (R2 * R3) / R1 = (15 * 30) / 10 = 45Ω.

Using the balance condition R1/R2 = R3/R4, we have 10/20 = 30/R4, which gives R4 = 20Ω.

For balance, R1/R2 = R3/R4. Thus, 10/20 = 15/R4, giving R4 = 30Ω.

Using the balance condition R1/R2 = R3/R4, we have 1/2 = 3/R4. Solving gives R4 = 6Ω.