A. 80 m
B. 60 m
C. 40 m
D. 20 m
International ohm is defined in terms of the resistance of________________?
A. a column of mercury
B. a cube of carbon
C. a cube of copper
D. the unit length of wire
A rheostat differs from potentiometer in the respect that it_____________?
A. has lower wattage rating
B. has higher wattage rating
C. has large number of turns
D. offers large number of tapg
The insulation on a current carrying conductor is provided__________?
A. to prevent leakage of current
B. to prevent shock
C. both of above factors
D. none of above factors
74. Sparking occurs when a load is switched off because the circuit has high_________?
A. resistance
B. inductance
C. capacitance
D. impedance
The substances which have a large number of free electrons and offer a low resistance are called____?
A. insulators
B. inductors
C. semi-conductors
D. conductors
The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true_______________?
A. The current through each bulb in same
B. The voltage across each bulb is not same
C. The power dissipation in each bulb is not same
D. None of the above