The maximum number of electrons in an energy level is given by the formula 2n². For n=3, it is 2(3)² = 18.

The maximum number of electrons in an energy level is given by 2n^2. For n=4, it is 2(4^2) = 32.

For the first order of bright fringe in reflected light, the minimum thickness of the soap bubble is λ/4 due to the phase change upon reflection.

When the object is placed between the focal point and the mirror, the image formed is virtual and erect.

When the object is placed beyond 2F, the image formed by a convex lens is real, inverted, and diminished.

The path difference for the first minimum in single-slit diffraction is λ/2.

The peak voltage (V_peak) is related to the RMS voltage (V_rms) by the formula V_peak = V_rms × √2. Therefore, V_peak = 220 V × √2 ≈ 311 V.

The peak voltage (V_peak) is related to the RMS voltage (V_rms) by the formula V_peak = V_rms × √2. Therefore, V_peak = 220 V × √2 ≈ 311 V.

Percentage error = (|Measured - True| / True) × 100 = (|10.0 - 9.5| / 9.5) × 100 = 5.26%.

Percentage error is calculated as (|True Value - Measured Value| / True Value) * 100 = (|25 - 20| / 25) * 100 = 20%.

Percentage error = (|Measured - True| / True) × 100 = (|20.0 - 19.5| / 19.5) × 100 ≈ 2.56%.

Percentage error = |(True value - Measured value) / True value| * 100 = |(50 - 48) / 50| * 100 = 4%.

In phase means the phase difference is 0 radians.

If two particles are executing simple harmonic motion in the same direction with the same amplitude and frequency, their phase difference is 0.

If they have the same frequency and direction, the phase difference is 0.

Poisson's ratio (ν) = Lateral strain / Longitudinal strain = 0.002 / 0.005 = 0.4.

Poisson's ratio (ν) = -lateral strain / longitudinal strain = -0.008 / 0.02 = 0.4.

Poisson's ratio (ν) = Lateral strain / Longitudinal strain = 0.02 / 0.01 = 2.

Poisson's ratio (ν) = -lateral strain / longitudinal strain = -0.005 / 0.01 = 0.5.

Potential difference V = E * d = 50 N/C * 0.4 m = 20 V.

Potential difference V = E * d = 400 N/C * 0.5 m = 200 V.

At maximum displacement, potential energy is maximum and kinetic energy is zero.

Potential energy U = k * q1 * q2 / r = (9 × 10^9 N m²/C²) * (3 × 10^-6 C) * (4 × 10^-6 C) / 0.2 m = 54 J.

Potential energy U = k * q1 * q2 / r = (9 × 10^9 N m²/C²) * (3 × 10^-6 C) * (4 × 10^-6 C) / 0.3 m = 0.36 J.

Potential energy (PE) is calculated using the formula PE = mgh. Here, PE = 2 kg × 9.8 m/s² × 10 m = 196 J.

Potential energy U = k * q1 * q2 / r = (9 × 10^9 N m²/C²) * (3 × 10^-6 C) * (4 × 10^-6 C) / 0.2 m = 54 J.

The potential energy (U) stored in a capacitor is given by U = 1/2 CV^2.

The potential energy (U) stored in a capacitor is given by the formula U = 1/2 CV², where C is the capacitance and V is the voltage across the capacitor.

Power P = I^2 * R = (3A)^2 * 10Ω = 9 * 10 = 90W.

Power P = I^2 * R = (2 A)^2 * 10 Ω = 4 * 10 = 40 W.