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A hygrometer is an instrument that is used to measure water vapor in the atmosphere. This is also commonly referred to as relative humidity in the atmosphere.

The boiling point of a liquid depends on temperature, atmospheric pressure, and the vapor pressure of the liquid. When the atmospheric pressure is equal to the vapor pressure of the liquid, boiling will begin

OPTION B is the correct answer because gravitational force is inversely proportional to the square of distance between the two bodies according to Newton's law of universal gravitation. \( F_g = G\frac{m_1m_2}{r^2}\)

An electric motor is an electrical machine that converts electrical energy into mechanical energy.

Power[p] = IV → 2 * 440 = 880Watt Energy = p * t = 880 * 48hrs = 42240 or 42.24kwh But 1 kwh cost $0.40 ∴ 42.24kwh costs 42.24 x 0.40 = 16.896 or $16.90

Given; L = 2H F = \(\frac{50}{\pi}\) \(H_2\) \(X_L\) = ? \(X_L\) = 2\(\pi\)fL = 2\(\pi\) x \(\frac{50}{\lambda}\) x 2 = 200\(\Omega\)

No expanded working has been attached for this question yet. The verified answer is Option B.

Capacitive reactance, X\(_C\) = \(\frac{1}{2\piFC}\) → \(\frac{1}{2\pi * 500/\pi * 5 * 10^{-6}}\) = \(\frac{1}{0.005}\) → 200\Omega

Given f = 1.6 x10\(^{16}\)\(H_3\), h = 6.63 x 10\(^{-39}\)Js e = 1.6 x 10\(^{-19}\)C, V = ? V = \(\frac{w}{e} = \frac{hf}{e}\) = \(\frac{1.6 \times 10^{16} \times 6.63 \times 10^{34}}{1.6 \times 10^{-19}}\) = 66.3V

Both the electric field and magnetic field affect the \beta-particles.

Alpha decay or \alpha-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two.

In 1924 Louis de Broglie introduced the idea that particles, such as electrons, could be described not only as particles but also as waves.

Objects distance (u) = image distance (v) object distance = 3m |uv| = 3 + 3 = 6m

Concave Mirror: It is a spherical mirror whose outer surface is polished and inner or concave side is reflecting surface. Convex Mirror: It is a spherical mirror whose inner surface is polished and whose outer side or convex side is the reflecting surface. f = \(\frac{m}{4}\) = f = \(\frac{d}{4}\) f = \(\frac{20}{4}\) = 5cm (For metal, it is the polished side that will be the reflecting surface)

\(\frac{\text {sin i}}{\text {sin r}}\) = \(\frac{\text {velocity in air}}{\text {velocity in glass}}\) \(\frac{\text {sin i}}{\text {sin 30}}\) = \(\frac{3 \times 10^{8}}{2 \times 10^{8}}\) Sin i = \(\frac{3}{4}\) = 0.75