The resistance of a few meters of wire conductor in closed electrical circuit is____________?
(A) practically zero
(B) low
(C) high
(D) very high
Which of the following statement is true________________?
(A) A galvanometer with low resistance in parallel is a voltmeter
(B) A galvanometer with high resistance in parallel is a voltmeter
(C) A galvanometer with low resistance in series is an ammeter
(D) A galvanometer with high resistance in series is an ammeter
A 3 Q resistor having 2 A current will dissipate the power of_______________?
(A) 2 watts
(B) 4 watts
(C) 6 watts
(D) 12 watts
The filament of an electric bulb is made of______________?
(A) carbon
(B) aluminium
(C) tungsten
(D) nickel
In a series circuit with unequal resistances______________?
(A) the highest resistance has the most of the current through it
(B) the lowest resistance has the highest voltage drop
(C) the lowest resistance has the highest current
(D) the highest resistance has the highest voltage drop
The rating of a fuse wire is always expressed in________________?
(A) ampere-hours
(B) ampere-volts
(C) kWh
(D) amperes
In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains______________?
(A) length of heating element should be decreased
(B) length of heating element should be increased
(C) length of heating element has no effect on heating if water
(D) none of the above
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will__________
(A) decrease
(B) increase
(C) remain same
(D) heater will burn out
Which of the following quantities remain the same in all parts of a series circuit ____________?
(A) Voltage
(B) Current
(C) Power
(D) Resistance
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