3.3.3 In Class or Homework Exercise 1. The rectangular loop below is being pulled to the right‚ out of the magnetic field which points inward as shown. In what direction is the induced current? No current is induced in the top or bottom wire‚ since they are moving parallel to themselves. The only current induced is in the left wire‚ where the current is induced upward. The result will be a clockwise current. 2. If the solenoid below is being pulled away from the loop shown‚ in what direction
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reading of the galvanometer remains the same with switch S open or closed‚ then what is the value of current through galvanometer ? 1 di es IP IR P w .s to V B Q HS w A da y D C G D w R 6. 7. 8. 9. How will the magnetic field intensity at the centre of a circular coil carrying current change‚ if the current through the coil is doubled and the radius of the coil is halved ? 1 Define eddy current. What is the ratio of speed of gamma rays and radiowaves in vacuum
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robotics‚ mecatronics‚ electric vehicles‚ high speed transportation etc. SYNCHRONOUS RELUCTANCE MOTORS * A reluctance motor is a type of synchronous electric motor which induces non-permanent magnetic poles on the ferromagnetic rotor. * Torque is generated through the phenomenon of magnetic reluctance. Operating principle * Whenever a piece of ferromagnetic material is
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me = 9.1 x 10-31 kg Mass of neutron mn = 1.675 x 10-27 kg Boltzmann’s constant k =1.381 x 10-23 JK-1 Avogadro’s number NA = 6.022 x 1023 mol-1 Radius of earth = 6400 km UNITS- 1. ELECTROSTATICS 2.CURRENT ELECTRICITY 3.MAGNETIC EFFECT OF CURRENT AND MAGNETISM 4. EMI & AC 5. EM Waves. Q.1 How is the relative permeability (µr) of a material related to its susceptibility (χm) ? 1 Q.2 A metallic wire 1 m in length is moving normally across a field of 0.1 T with a speed
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| Two small spheres‚ each with mass m = 3.0 g and charge q‚ are suspended from a point by threads of length L = 0.22 m. What is the charge on each sphere if the threads make an angle = 15º with the vertical? | | A) 0.79 C B) 2.9 C C) 75 mC D) 6.3 C E) 0.11 C | | | | Three charges‚ each of Q = 3.2 10–19 C‚ are arranged at three of the corners of a 20-nm square as shown. The magnitude of the electric field at D‚ the fourth corner of the square‚ is approximately
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Required Vocabulary – IB 12 Higher Level Physics and Physical Measurement 1. Fundamental Units – seven basic units of the SI measurement system: kilogram‚ second‚ mole‚ meter‚ ampere‚ Kelvin‚ candela. 2. Derived Units – units that are combinations of fundamental units. These combinations may or may not have a separate name. (eg. 1 kg m/s2 = 1 N) 3. Accuracy - An indication of how close a measurement is to the accepted value (a measure of correctness). 4. Precision - An indication
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deals with the magnetic field induction at a point due to a small current element. Current element A current element is a conductor carrying current.It is the product of current‚I and length of very small segment of current carrying wire ‚dL. Let us consider a small element AB of length dl of the conductor RS carrying a current I. Let r be the position vector of the point P from the current element I dL.and θ be the angle dl and r. According to Biot-Savart’s law‚the magnetic field induction
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following experiment) of the microphone‚ the diaphragm vibrates back and forth‚ and the attached coil moves along with it. Additionally‚ magnet is attached with coils on a cardboard. When the coil alternately approaches and move back from the magnet‚ the flux through the coil changes. As a result of this‚ an ac emf is induced in the coil. Next‚ this electrical signal is sent to an amplifier and to the speakers respectively. In a moving-magnet microphone‚ the magnet is attached to the diaphragm and moves
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Electrodynamic suspension Stability Power and energy usage Advantages and disadvantages of Maglev Train Introduction • Magnetic levitation transport is a form of transportation that suspends guides and propels vehicles through the harnessing of electromagnetic force. • The term "maglev" refers not only to the vehicles but also to the railway system. • Maglev train uses magnetic levitation from a very large number of magnets for lif and propulsion. • Has the potential to be faster‚ quieter and smoother
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UNIT-1 ELECTROSTATICS Where the energy of capacitor does resides? Do electrons tend to go to region of low or high potential? What is the net charge on the charged capacitor? A Gaussian surface encloses an electric dipole within it. What is the total flux across sphere? 5. Find the dimension of 1/2εoE2. 6. In a certain l m3 of space‚ electric potential is found to be V Volt throughout. What is the electric field in this Region? 7. If Coulomb law involves 1/r3 instead of 1/r2 dependence‚ would Gauss
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