The potential difference between the terminals of an electric iron is 240 V and the current is 5.0 A. What is the resistance of the electric iron?
48 Ω
4.8 Ω
0.48 Ω
480 Ω
Pick the odd one out.
Ammeter
Voltmeter
Rheostat
Odometer
Name the commercial unit of electric energy.
kilowatt hour
joule
watt
erg
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
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
An electric lamp whose resistance is 30Ω and a conductor of 4Ω resistance,one end is connected with each other and another end is connected to a 6V battery. Calculate the total resistance of the circuit.?
34
3.4
0.3
1200
When an electric lamp is connected to 12 V battery,it draws a current of 0.5 A.The power of the lamp is :
0.5 W
6 W
12 W
24 W
The reciprocal of a resistance of a conductor is
Conductance
Capacitance
Conductivity
Impedance
Which unit is used to measure the electric current?
Ampere
Volt
Coulomb
Watt
By what name is unit Joule/ coulomb known as :
Weber
Farad
