With solution or explanation

15. In a parallel circuit containing set of bulbs, if one of the bulb blew up the effective resistance offered will: a. Increase b. decrease c. fluctuate d. remains the same 16. Which of the following quantity remains in parallel circuit a. Current b. voltage c. current 8!. voltage d. none 17. As the resistance of a circuit increases, the current will a. Increase b. decrease c. fluctuate d. remains the same 18. In a parallel circuit if one of the light bulbs burns out the rest . a. stop the ow of electricity c. of the light bulbs burn out also b. can still light up d. will go out 19. A string of five series resistors is connected across a 6 V battery. Zero voltage is measured across all resistors except R3. The voltage across R3 is a. UV b. 0.6V c. 6V d. 1.2V 20. When one of three series resistors is removed from a circuit and the circuit is reconnected, the current a. increases by one-third b. decreases by the amount of current through the removed resistor c. double d. decreases by one-third 21. Current in a resistor varies in direct proportion to the voltage applied to it and is inversely proportional to the resistor's value." a. Ohm's law b. KCL c. KVL d. Coulomb's law 22. The total current in a parallel circuit equals the sum of the individual branch currents." a. Ohm's law b. KCL c. KVL d. Bolen's law 23. Two resistors 4 ohms and 2 ohms are connected in series, what is the voltage across R1? (Refer to the diagram on the right It a. 12 V c. 6V b. 8V d. 4V 24. Find the value of v if v1=20V. Find the value of v if v1=2DV and value of current source is ll. R,=4n REES} a a a a a. 10 v b. 12 v v c. 14 v mu T d. 16 v 25. Kirchhoff's current law is applicable to only to a. Junction in a network c. Closed loops in a network b. Electric circuits d. Electronic circuits 26. What part of an atom is the most responsible for magnetism? a. Proton b. electron c. neutron d. nucleus 27. Magnetic domains are . a. regions that may or may not be magnetized c. clusters of atoms randomly aligned b. regions of atoms magnetically aligned d. blocks of material 28. What can you make visible by sprinkling iron filings around a magnet? a. the areas called domains c. the magnetic field lines b. the magnetic forces d. the north and south pole 29. A magnet can lose its magnetic properties if you a. drop or hit the magnet b. heat up the magnet c. put the magnet in a strong magnetic field that is opposite of its own d. all of the above 30. A tiny region ion a magnet where all the atoms are grouped together and their poles are aligned. a. South b. north c. commutator d. domain