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F = \(\frac {1}{2L}\) \(\sqrt\frac{T}{m}\) T2 = 4T1 ; L2 = 2L1 \(\frac{2F_1L_1}{2F_2L_2}\) = \(\sqrt\frac{T_1}{T_2}\) \(\frac{400\times L_1}{F \times L_1}\) = \(\sqrt\frac{T_1}{4T_1}\) F = 400Hz

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

The frequency of light is constant across different media, so the frequency remains 6.0 x 10\(^{14}\) Hz

V = -2u F = \(\frac{uv}{u + v}\) 20 = \(\frac{uv - 2u}{u - 2u}\) u = 10cm

the object is always located between the optical center of the lens and twice the focal length. or the object is placed at a point between F and 2F to produce a real, enlarged, upright image of the inverted object.

Yellow light is a mixture of red and green light, so yellow will reflect both red and green light. This means that a yellow object will appear red under red light and green under green light. So, the green stripes on the flag will appear green under yellow light, as green is part of yellow. The white stripe will look yellow because it reflects all colors. Thus, when viewed under pure yellow light, the Nigerian flag will show green, yellow, and green.

Diaphragm: Found in both the receiver and the microphone; it vibrates to convert sound waves into electrical signals in the microphone and back into sound in the receiver. Soft iron pole pieces: Used in microphones to direct the magnetic field, but not found in the receiver. Permanent magnet: Present in the receiver, where it converts electrical signals back into sound, but not found in carbon microphones. Carbon blocks: These are used in carbon microphones to convert sound into electrical signals; they are not found in the receiver. In a telephone handset, the following components are found in the receiver but not in the microphone: ii. Soft iron pole pieces iii. Permanent magnet

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

(a) The experiment is set up as shown in the diagram. The wooden box effective length, I of the string remains constant throughout the experiment. Also the string used is of uniform thickness and must not be changed to ensure that the mass per unit length is constant throughout the experiment. The length of string is tied to the stake at one free end while a known mass is added to the other end. This creates a tension in the string which is equal to the weight of the attached mass. A tuning fork of known frequency is set vibrating and the string is tuned in unison with the fork. The frequency of the fork is recorded. The procedure is repeated by increasing the masses and using different tuning forks four more times. The corresponding tension (weights) and frequency are recorded in a table. Experiment to show that frequency is proportional to the square root of the tension, T. Mathematically, the graph of F against \(\sqrt{T}\) is a straight line through the origin. (b)(i) (ii) Second overtone (c)(i) (ii)

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

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 C.

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

Number of images = (360 / 120) - 1 = 3 - 1 = 2 number of images formed = 2

λ = 3.5cm V =D/T = 31.5/1.5 = 21; f = V/ λ = 6.0