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