a) Applied voltage to the circuit b) Changes in the stored energy in the inductors and capacitors c) Resistance of the circuit d) Impedance of the circuit Ans: (b)
a) R-L circuit b) R-C circuit c) Pure inductive circuit d) R-L-C circuit Ans: (d)
a) Infinity b) Zero c) About 500 ohms d) About 50 ohms at room temperature Ans: (b)
a) Protons b) Electrons c) Neutrons d) Positive or negative or negative ions Ans: (d)
a) 5000 ohms, 1 watt b) 250 ohms, 2 watts c) 1000 ohms, 2 watts d) 500 ohms, 2 watts Ans: (b)
a) 4.5 ohms, 1 watt b) 45 ohms, 10 watts c) 1000 ohms, 2 watts d) 45,000 ohms, 1/3 watt Ans: (d)
a) Is a primary cell b) Is a secondary cell c) Has unlimited shelf life d) Has a maximum current rating of about 150 mA Ans: (b)
a) Local action caused by chemical impurities b) Polarization caused by electrolysis c) Depolarization caused by manganese dioxide d) An advantage because it increases the voltage output Ans: (b)
a) The battery voltage must be more than charging voltage b) Connect the positive battery terminal to the negative on the charging current c) The charging current must flow in same direction as the discharging current d) Connect negative to negative and positive to positive Ans: (d)
a) Is a primary cell b) Uses sulphuric acid electrolyte c) Has 2.5 volts output d) Has nickel and iron electrolyte Ans: (d)
a) Increase the current output b) Increase the voltage output c) Decrease the internal resistance d) Decrease the amount of charging voltage required Ans: (b)
a) Zero b) Ohms c) 45 ohms d) Infinity Ans: (b)
a) Excess charge on the nail b) Magnetic induction c) Declination of magnetic field d) Molecular magnets in the air around the nail Ans: (b)
a) Geographical poles b) True north pole c) Magnetic north pole d) Agonic line of the earth filed Ans: (c)
a) No magnetic field b) A counter-clockwise field in the plane of the power c) A clockwise field in the plane of the paper d) A counter-clockwise field in the plane perpendicular to the paper Ans: (b)