A wire moves across a magnetic field. The emf produced in the on A) the strength

Question

A wire moves across a magnetic field. The emf produced in the on A) the strength of the magnet field B) the length of the wire C) the orientation of the wire with respect to the magnetic field D) all of the given answers A horizontal metal bar rotates at a constant angular velocity w about a vertical axis through one of its ends while in a constant magnetic field B that is directed down. The emf induced between the two ends of the bar is A) constant and proportional to the product B omega. B) constant and proportional to the product B omega^2. C) constant and proportional to the product B^2omega^2. D) none of the given answers If the electric field an EM wave has peak value of 2.0 V/m, what is the peak value of the magnetic field? A) 6.7 nT B) 2.0T C) 3.0 times 10^8 T D) of the given answers Electromagnetic waves are: A) longitudinal. B) transverse. C) both longitudinal and transverse. D) neither longitudinal or transverse. Define: (a) (i) Electric and (ii) Magnetic Field; (b) Show the pictorial presentation (i) dipole and (ii) magnetic field Given a resistance of 10 M Ohm, what capacitance value is required to have a time constant of 1 s? The defibrillator capacitor (figure on the right) discharges in 10 ms. How much current does it send through the heart? Briefly explain some noise health effect(s) that you are familiar with. What size capacitor must be placed in series with a 30-Ohm resistor and a 40-mu H coil if the resonant frequency of the circuit is to be 1000 Hz? A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A flows? A teapot with a surface area of 820 cm^2 is to be plated with silver. It is attached to the negative electrode of an electrolytic cell containing silver nitrate (Ag^+ NO^3).The cell by a 12.0-V battery a has a resistance of 1.50 Ohm. If the density of silver is 1.05 times 10^4 kg/m, over what time interval does 0.133 mm layer of silver build up on the teapot? A copper wire has a circular cross section with a radius of 3.75 mm. (a) If the wire carries a current of 8. 3.40 A, find the drift speed of the electrons in the wire. (Assume the density of charge carriers what (electrons) in a wire is n = 8.46 times 10^28 electron/m^3.) (b) All other being equal, per happens to the copper having a larger number of conduction electrons drift speed in wires made of metal a atom than copper? Explain. A concept map is a diagram of nodes, each containing concept labels, which are linked together with directional lines, also labeled. The concept nodes are arranged in hierarchical levels that move from general to specific concepts. On a separate piece of paper use a concept map to explain the following: (i) static Charge (ii) Magnetism (iii) Transformer (iv) Capacitor (v) Inductor

Explanation / Answer

Answer 1 (a): (i)Electric Filed : It is a region around a charged particle or object within which a force would be exerted on other charged particles or objects.

(ii) Magnetic filed : It is a region around a magnetic material or a moving electric charge within which the force of magnetism acts.

(b) (i) Electric Dipole

(ii) Magnetic filed lines,

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