NCUK IFY Physics - Q) Current

Current is a flow of...

• electrons

• ions

• protons

• any charged particles

Current in a metal is a flow of...

• electrons

• ions

• protons

• any charged particles

Current in an electrolyte is a flow of...

• electrons

• ions

• protons

• any charged particles

Conventional current flows from...

• negative to positive

• positive to negative

• negative to negative

• positive to positive

Electrons flow from...

• negative to positive

• positive to negative

• negative to negative

• positive to positive

Q

• Coulomb

• Ampere

• Volt

• Ohm

 $I$  

• Coulomb

• Ampere

• Volt

• Ohm

Current is the rate of flow of charge

• $V=IR$

• $P=I^2R$

• $Q=I\Delta t$

• $\epsilon=I\left(R+r\right)$

An ammeter...

• has very low resistance

• has very high resistance

• is connected in parallel

• is connected in series

A voltmeter...

• has very low resistance

• has very high resistance

• is connected in parallel

• is connected in series