One coulomb is equal to charge of electrons:
6.25x10-19
6.25x1019
6.25x1018
6.25x10-18
What does a switch do:
Oppose the current
Open and close the circuit
Store energy
Provide voltage
The particles emitted from a hot cathode surface are:
Positive ions
Negative ions
Protons
Electrons
Simplest electrical circuits use:
One wire
Two wires
Four wires
Five wires
If a neutral body is brought near to the electroscope its leaves:
Diverge
Contract
Shut
Remain in normal position
Which instrument is used to measure current, resistance and potential difference:
Galvanometer
Digital meter
Voltmeter
Ammeter
The value of K in SI unit is:
9X1020 Nm2C2
8X109Nm2C2
9X109Nm2C2
10X10-9 Nm2C-2