Which of the following characteristic is not suitable for a fuse wire?
thin and short
thick and short
low melting point
higher resistance than rest of wiring
The work done in moving a unit charge across two points in an electric circuit is a measure of :
Current
Potential difference
Resistance
Power
The current of 10 A is drawn by a filament of an electric bulb for 10 minutes. Find the amount of electric charge that flows through the circuit ?
100 C
6000 C
600 C
10 C
The heat produced by passing an electric current through a fixed resistor is proportional to the square of:
magnitude of resistance of the resistor
temperature of the resistor
magnitude of current
time for which current is passed
Which unit is used to measure the electric current?
Ampere
Volt
Coulomb
Watt
Current through a 12 V tungsten filament lamp connected to a 12 V accumulator of negligible resistance of 3 A. Calculate resistance of filament?
4 Ω
6 Ω
12 Ω
24 Ω
A wire whose resistance is 90 Ω is cut into 3 pieces of equal lengths which are then arranged in parallel.Calculate the resistance of the combination.
10 Ω
1/10 Ω
30 Ω
1/30 Ω
Name the commercial unit of electric energy.
kilowatt hour
joule
watt
erg
The unit for expressing electric power is :
volt
coulomb
A flow of 107 electrons per second in a conducting wire constitutes a current of :
1.6 x 10-26 A
1.6 x 1012 A
1.6 x 10-12 A
1.6 x 1026 A
