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The V-I graph of an ohmic material is a straight line passing through the origin.

The impedance of a R-L circuit is given by: Z = \sqrt(R\(^2\) + XL\(^2\)) ----------- eqn(1) where Z is the impedance, R is the resistance, and XL is the inductive reactance XL = 2\pifL ------------ eqn(2) where f is the frequency From eqn(2), XL = 2 * \pi * 60 * 0.5 = 60\pi Also, from eqn(1), Z = \sqrt(50\(^2\) + (60\pi)\(^2\)) Z = 195.0\Omega

A real image is defined as An image that is formed when the light rays from an object converge and meet each other and can be projected onto a screen. Real images are always inverted, Real images can be projected onto pieces of paper or screens. An example of a real image is the image formed on a cinema screen. A virtual image is defined as An image that is formed when the light rays from an object do not meet but appear to meet behind the lens and cannot be projected onto a screen. Virtual images are always upright, Virtual images cannot be projected onto a piece of paper or a screen. An example of a virtual image is a person's reflection in a mirror.

The angle of incidence l = 30º The angle of refraction , r =? The refractive index of glass ng = 1.5 The refractive index of ethyl alcohol, ne = 1.36 from snell's law : \(\frac{n_e}{n_g} = \frac{sini}{sinr}\) \(\frac{1.36}{1.5} = \frac{sin30º}{sinr}\) 1.36sinr = 1.5 x sin30º sinr = \(\frac{1.5 \times sin30º}{1.36}\) sinr = 0.5515 r = \(sin^{-1}\)(0.5515) r = 33.5º

The fundamental frequency of vibrations of a string is inversely proportional to the square root of mass per unit length (linear density), if the tension and vibrating length of the string are constant.

When drawing a ray diagram for instance drawing two rays from the head of the object, the point of intersection of the two rays represents the position of the head of the image, but in the case of parallel rays of light drawn from the object such that the image is likewise formed at infinity, the ray from the head of the object forms the head of the image, similarly, the ray from the leg of the image. from the diagrams drawn, it is only in W that the ray from the head forms the leg of the image, others are correctly drawn

COMPOUNDS BOILING POINTS Butane -1 ^\circC Ethanoic acid 118 ^\circC Water 100 ^\circC Ethanol 78.37 ^\circC

Halide: A binary compound of a halogen with another element or group.

No. of moles = \(\frac{molar conc \times volume}{1000}\) No. of moles = \(\frac{0.108 \times 50}{1000}\) : No. of moles = 0.0054 moles = \( 5.4 \times 10^{-3}\)

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

Momentum is a physical quantity that describes the motion of an object. It is defined as the product of an object's mass and its velocity. Unlike acceleration, displacement, and velocity, which describe different aspects of motion, momentum specifically quantifies the motion of a body.

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

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

- the mean free path is the average distance traveled by a moving particle (such as an atom, a molecule, a photon) between successive impacts .

- Electromagnetic waves are waves that have no medium to travel whereas mechanical waves need a medium for its transmission. - sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum.