d) None of these. 5. Materials which easily allow the passage of electric current are known as: a) Insulators. b) Semi-Conductors. c) Conductors. d) None of these. with it. 6. The internal resistance of a voltage source is always connected in a) Parallel b) Series. c) Series and Parallel. d) None of these. 7. If the energy is stored in a magnetic field, then the circuit element is: a) a pure resistor. b) a pure capacitor. c) a pure inductor. d) None of these.

An iron core 0.4 m long and 5 square cm in cross section, is wound with 300 turns. When a current of 0.5 Aflows in the coil, how much is the inductance of the coil. Assume the core has a permeability of 2500

In a semiconductor crystal, the atoms are held together by: A) The interaction of valence electrons B) Ionic bonds C) Covalent bonds D) Forces of attraction Choose correct answer

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A moving coil voltmeter with a resistance of 200 gives a full scale deflection of 120 degree, when a potential difference of 100mV is applied across it. The moving coil has dimension of 30mm*25mm and is wounded with 100 turns. The control spring constant is 0.375 *10-6N- m/ degree. Find the flux density, in the air gap. The specific resistance for copper=1.7* 10-80m . 0.13 0.22 0.15 0.12 0.2 wb/m2 wb/m2 wb/m2 wb/m2 wb/r flux density

Which statement is true about a resistor? O A resistor stores energy in an electric field and returns that energy to the circuit. O A resistor stores energy in a magnetic field and returns that enrgy to the circuit. O A resistor absorbs heat and and dissipates electrical energy O A resistor absorbs electric power and dissipates heat

A single square loop of wire with sides of 0.5 meter is in a magnetic field of 1 tesla (T). The square loop is reduced to sides of 0.25 m in 0.3 seconds. The wire has a natural resistance of 1Q What is the magnitude of the induced voltage? *

Calculate the equivalent resistances Rin of the following circuits. (The resistance value of the diodes in the conduction will be 0, the resistance value of the diodes in the insulation will be taken as infinity. R1=10ohm