Factors of Electric Current & Ohm's Law

What is the symbol used to represent the unit of electric current?

• R

• I

• A

• C

The factors that can affect the resistance of a material are:

• length,thickness,size, colour

• length, cross-sectional area ,insulation,type of material

• width,type of material, cross-sectional area, insulation

• temperature,length,type of material,cross-sectional area

Which of the following is the unit for potential difference?

• volt

• ohm

• ampere

• coulomb

The unit of resistance is:

• ohms

• amperes

• watts

• volts

The force that causes electrons to move through a circuit is called:

• resistance

• voltage

• current

• power

Electric current is measured in:

• ohms

• coulombs

• amperes

• volts

A current which flows in one direction and then changes a flows in an opposite direction is called a/an:

• indirect

• changing

• direct

• alternating

The symbol used to represent resistance is:

• O

• E

• ^I

• R

The opposition to the flow of an electric current is:

• resistance

• potential difference

• power

• voltage

A potential difference of 24 V is applied to a 150 resistor. How much current flows through the resistor?

• 0.15 A

• 3600 A

• 6.25 A

• 0.16 A