As the temperature of a conductor rises, its resistance:
Increases
Decreases
Does not change
None of these
A positive electric charge:
Attracts other positive charge
Repels other positive charge
Attract a neutral charge
Repels a neutral charge
The amount of current that can be painful is:
0.005A
0.001A
1A
2A
The product of frequency and time period is equal to:
an ideal voltmeter is that which draws:
small current
no current
high current
none of these
The unit of electrical energy is:
Joule
Watt
Volt
Electron volt(eV)
Electron gun has an electrode called for controlling the flow of electrons in the beam:
Plate
Grid
Screen
Filament
The value or current I passing through a conductor is inversely proportional to:
Temperature
Potential difference
e.m.f.
resistance
