Which of the following instrument is used to measure current in a circuit?
Volt meter
Rheostat
Ammeter
Battery
The amount of electric charge that flows through the circuit is 2.5 C and the time taken is 5 s. Find the amount current flowing ?
4 A
0.4 A
40 A
None of these
Kilowatt - hour is the unit of
Potential difference
Electric power
Electric energy
Charge
The unit of potential difference is
Ampere
Ohm
Coulomb
Volt
The fusion process can be carried out only at an extremely high temperature of the order of
107K
10-7K
1017K
10-17K
The potential difference required to pass a current 0.2 A in a wire of resistance 20 ohm is
100 V
4 V
0.01 V
40 V
The obstruction to the flow of electric current is called
Potential
Resistance
The phenomenon of radioactivity was discovered by
Otto Hahn
Henri Becquerel
Madame Marie curie
Rutherford
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
none of these
Which of the following is the cause of flow of electric current in the conductor?
Power