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An electric guitar functions via induction. As the steel strings vibrate a pickup coil of wire has an emf induced due to changing magnetic fields generated by the string. The perpendicular component of the field above the pickup coil is given by: B= 50mT+ 3.2mT·sin(2π 523 t/s) and is uniform at any given time over the area of the pickup coil. If the pickup coil has a radius of 2.7 mm and consists of 30 turns what is the induced emf in the pickup coil a function of time?
To monitor the breathing of a patient in the hospital, a thin belt is wrapped around the patients chest. The belt is a composed of 200 turns. When the patient inhales, the area of the coil increases by 39 square centimeters. The magnitude of Earth's magnetic field is 50.0 μT and makes a 28 degree angle with the plane of the coil. If a patient takes 1.80 s to inhale, calculate the induced EMF generated in the coil during this time.
4. I. Which of the following mixtures are miscible liquids?
a. Pentane and acetic acid
b. Oil and water
c. 1,1,1,1-tetrachloromethane and ethanol
d. Methanol and ethylamine

II. Liquid-liquid miscible mixtures can be separated through
a. chromatography
b. fractional distillation
c. filtration
d. both a and b

III. In fractional distillation, a large surface area for condensation is provided through
a. a thermometer
b. water bath
c. a fractionating column
d. reflux condenser
IV. The two primary components of natural gas are
a. butane and hexane
b. ethane and propane
c. methane and ethane
d. pentane and butane

V. Which of the following mixtures are immiscible liquids
a. water and ethanol
b. toluen and ethanoic acid
c. benzene and benzoic acid
d. diethyl ether and hexane

5. a. Write the structural formula of the following organic compounds
i. 5-ethyl-2-methyl-3-heptyn-1-ol
ii. 4-methyl-2-hexanone
iii. 3,4-dipropyl-1,3-hexadien-5-yne
iv. 4-ethyl-5-methylcyclohexane
4. I. Which of the following mixtures are miscible liquids?
a. Pentane and acetic acid
b. Oil and water
c. 1,1,1,1-tetrachloromethane and ethanol
d. Methanol and ethylamine

II. Liquid-liquid miscible mixtures can be separated through
a. chromatography
b. fractional distillation
c. filtration
d. both a and b

III. In fractional distillation, a large surface area for condensation is provided through
a. a thermometer
b. water bath
c. a fractionating column
d. reflux condenser
3. A. Briefly explain the use of each of four major classes of organic compounds that are very important in living organisms.
B. List any 2 compounds of ketones and esters and their uses.
1. A. Fill in the blank space with the suitable answers.
Nitrogen, halogens and sulfur in organic compounds can be detected by performing the ................ test.
Presence of carbon and hydrogen in organic compounds can be detected by heating the organic compounds with .............

B. How will you evaluate the effectiveness of the methods you used to purify the compounds?

2. A. Differentiate between qualitative and quantitative analysis.

B. Identify the suitable methods to separate each of the following mixtures and explain how to separate them
i. Vegetable oil and sugar
ii. Salt and sugar
iii. Benzene and benzoic acid
Copper of thickness (d) is plated on a cathod of a copper voltameter if the total surface are of the cathod is 60cm2 and a steady current 5.0 ampere is maintained in the voltermetre for 1 hour calculate the value of the (density of copper is equal to 8.9 * 10 2 - 3 kg m32 - 3 electrochemical equivalent of copper is equal to 3.3*6 crispiest -7 kgc
A ray of light travelling in air falls on the surface of a transparent material at an angle of 45°to normal. It bends by 15° after refraction. Find the refractive index of the material
How many moles of PbCl2 are produced if 14 moles of AlCl3 are consumed?
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