The unit for expressing electric power is :
volt
joule
coulomb
watt
The device used for measuring potential difference is known as :
voltmeter
galvanometer
voltameter
potentiometer
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
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
Pick the odd one out.
Ammeter
Voltmeter
Rheostat
Odometer
The elements of electrical heating devices are usually made of :
Tungsten
Bronze
Nichrome
Argon
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
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 work done in moving a unit charge across two points in an electric circuit is a measure of :
Current
Potential difference
Resistance
Power
By what name is unit Joule/ coulomb known as :
Volt
Coulomb
Weber
Farad