Q.31)-A piece of wire having Resistance 'R' is cut into 'n' equal parts and then connected into parallel combination what will be the effective resistance of combination?
  • nR
  • R/n
  • n/R
  • R/n2
Q.32)-Water should not be used to extinguish fire caused by electricity, because
  • It may cause electrocution
  • It may cause dissociation of water
  • It may cause electric dissociation
  • Fault may occur in wires
Q.33)-Metal used for the manufacturing of Lightening conductor is
  • Iron
  • Aluminium
  • Copper
  • Zinc
Q.34)-When two semiconductors of P and N type are brought in contact, they form p-n Junction which acts like a/an
  • Conductor
  • Rectifier
  • Amplifier
  • Oscillator
Q.35)-Which of the following statements is incorrect regarding the resistance of a wire?
  • It depends upon the material of wire
  • It is proportional to the length of wire
  • It is proportional to the area of cross-section of wire
  • On increasing temperature resistance of metal wire increases
Q.36)-We can find with the help of Galvanometer
  • Resistance
  • Energy
  • Current
  • Temperature
Q.37)-Multimeter is used to measure the
  • Current
  • Voltage
  • Resistance
  • All of these
Q.38)-In A.C. circuits A.C. meter measures
  • Mean value
  • Rms value
  • Peak value
  • Root mean value
Q.39)-Which of the following instrument is used to measure the electric current?
  • Ammeter
  • Voltmeter
  • Wattmeter
  • Anemometer
Q.40)-S.I. Unit of electric charge is
  • Ampere
  • Coulomb
  • ESU
  • Kelvin