10th U2 05 Ohms Law

Understanding Ohm's Law

Multiple Choice

$$I=\frac{∆Q}{∆t}$$

Review:Electric Current is the flow of electrical charges per unit time and its ...

• Symbol: I,

  Unit: ampere,

  Unit symbol: A

• Symbol: Q,

  Unit: ampere,

  Unit symbol: A

• Symbol: I,

  Unit: coulomb,

  Unit symbol: C

• Symbol: Q,

  Unit: volt,

  Unit symbol: V

Multiple Choice

Potential difference is

the electrical energy per unit charge

across a device and its ...

• Symbol: I,

  Unit: ampere,

  Unit symbol: A

• Symbol: Q,

  Unit: ampere,

  Unit symbol: A

• Symbol: I,

  Unit: coulomb,

  Unit symbol: C

• Symbol: V,

  Unit: volt,

  Unit symbol: V

Multiple Choice

Electrical resistance is

the opposition to the flow of charges and its ...

• symbol: R,

  unit: ohm,

  unit symbol: Ω

• symbol: r

  unit: ohm

  unity symbol: Ω

• symbol: R

  unit: coulomb

  unit symbol: q or Q

• symbol: r

  unit: coulomb

  unit symbol: q or Q

Multiple Choice

Ohm's law is the relation between the voltage and the current

if the temperature of the ohmic material is constant and

its equation is .....

• $$V=\frac{I}{R}$$

• $$R=\frac{V}{I}$$

• $$I=\frac{V}{R}$$

• $$R=\frac{I}{V}$$

Multiple Choice

In Ohm's law, the resistance of a material is constant. What is the relation between voltage and current?

• directly proportional.

• linear with positive slope

• linear with negative slope

• Exponential

Multiple Choice

What is the name of the material that follows Ohm's Law?

• Ohmic material

• Filament

• conductor

• insulator

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

The graph is a representation of a filament inside of a traditional light bulb.

What type material is the filament made from?

• Non-ohmic

• ohmic

• insulator

• conductor

Multiple Choice

Which description of the graph regarding the non-ohmic material is correct?

• p.d. increases but current doesn't increase proportionally.

• p.d. increases and current increases too.

• current increases but p.d. doesn't

• current increases but p.d. remains the same.

Multiple Choice

Use the graph to find the value or magnitude of the resistor used in the experiment.

• 1Ω

• 2Ω

• 0.5Ω

• 4Ω

Multiple Choice

Use the graph to calculate the value or the magnitude of the resistor used in the experiment.

• 1Ω

• 1.5Ω

• 2Ω

• 4Ω

Ohm's Law describes the voltage will increase proportionally with the current if the resistance is the same at constant temperature.

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​Thank you!