Reversing the direction of current in a wire reverses the direction of the magnetic field around it.

The resistance of a semiconductor decreases when it is illuminated due to the generation of electron-hole pairs.

The resistance of a semiconductor decreases with an increase in temperature due to the increased number of charge carriers.

The resistance of a semiconductor decreases with an increase in temperature due to the increased number of charge carriers.

Shear modulus (G) is defined as shear stress divided by shear strain. If shear strain is constant, doubling shear stress does not change G.

The speed of light decreases when it passes from a less dense medium (air) to a denser medium (water).

In a parallel circuit, if one branch is disconnected, the total current decreases.

In a parallel circuit, adding more branches increases the total current.

At resonance in a parallel RLC circuit, the total current is maximum because the impedance is at its minimum.

In a parallel circuit, adding more resistors decreases the total resistance because the total resistance is given by 1/R_total = 1/R1 + 1/R2 + ...

Uniform pressure typically causes a decrease in volume, known as compression.

The volume of a solid generally decreases when subjected to uniform pressure, as per the bulk modulus.

Absolute error is calculated as the absolute difference between the true value and the measured value, which is |50 - 48| = 2.

Absolute error = |Measured value - True value| = |50.0 cm - 48.0 cm| = 2.0 cm.

Absolute error = |Measured value - True value| = |50.0 cm - 52.0 cm| = 2.0 cm.

Absolute error is defined as the difference between the measured value and the true value.

The standard acceleration due to gravity at the surface of the Earth is approximately 9.81 m/s².

The angle for the first minimum is given by sin θ = λ/a, where a is the slit width. Thus, sin θ = 500 nm / 0.5 mm = 0.001, leading to θ ≈ 30°.

Angular momentum L = mvr, where v is the tangential speed. L = 2 kg * 4 m/s * 3 m = 24 kg·m²/s.

The approximate value of gravitational acceleration on Earth is 9.8 m/s².

The atomic number of an element is defined as the number of protons in its nucleus. Therefore, an element with 12 protons has an atomic number of 12.

Average power (P) is given by P = V_rms × I_rms × power factor. Thus, P = 100 V × 5 A × 0.5 = 250 W.

Average power (P) is given by P = V × I × PF. Here, P = 230 V × 5 A × 0.8 = 920 W.

When the power factor is 1, the average power consumed is maximum and is given by P = V_rms × I_rms.

The base unit of mass in the SI system is the kilogram (kg).

The base unit of time in the SI system is the second (s).

Bulk modulus (K) = -ΔP / (ΔV/V) = 1000 kPa / (0.01 m³ / 1 m³) = 100000 kPa = 10000 kPa.

Bulk modulus (K) = -ΔP / (ΔV/V) = 1000 kPa / (0.01 m³ / 1 m³) = 100000 kPa.

Bulk modulus (K) = -ΔP / (ΔV/V) = 1000 kPa / 0.005 = 200000 kPa.

Bulk modulus (K) = -ΔP / (ΔV/V) = 50 MPa / (0.02 m³ / 1 m³) = 2500 MPa.