1kWh =
3.6 x 103J
3.6 x 106J
3.6 x 109J
none of these
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
The resistance of a wire of length 300 m and cross section area 1.0 mm2 made of material of resistivity 1.0 x 10-7 Ωm is :
2 Ω
4 Ω
20 Ω
30 Ω
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
12 W
6 W
24W
A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. Calculate the amount of electric charge that flows through the circuit.
200 C
300 C
400 C
100 C
The device used for measuring potential difference is known as
voltmeter
galvanometer
voltameter
potentiometer
Which unit could be used to measure current?
Ampere
Volt
Coulomb
Watt
Pick the odd one out
ammeter
rheostat
odometer
The reciprocal of a resistance of a conductor is
conductance
capacitance
conductivity
impedance
What is the order of magnitude of electric resistance of the human body (dry)?
102 ohm
104 ohm
106 ohm
108 ohm
