IB Physics Topic B.5 Current and Circuits…

Question

SLPaper 1A

View answer

Which statement is true about the resistance of a filament lamp as it operates at higher voltage?

A

It decreases due to increased drift speed.

B

It remains constant as it is an ohmic component.

C

It increases due to rising temperature.

D

It decreases because current increases.

Question

SLPaper 2

A student connects a variable resistor to a battery of emf $12\ \text{V}$ and measures the current in the circuit as the resistance is adjusted. The internal resistance of the battery is negligible.

(a)

Ohm’s law.

[1]

(b)

The current in the circuit is $1.5\ \text{A}$ when the resistance is adjusted to a certain value. this resistance.

[2]

(c)

The student increases the resistance. and what happens to the current and the power dissipated in the resistor.

[3]

SLPaper 1A

A metal wire obeys Ohm's law at room temperature. As current increases, its temperature rises and its resistance increases. Which of the following best describes the shape of its $V$ - $I$ graph?

SLPaper 1A

In an experiment, a student determines the resistance of a wire by plotting a $V$ vs $I$ graph. Which of the following describes the resistance?

SLPaper 1A

Which expression correctly gives the electrical power dissipated in a resistor?

IB Physics B.5 Current and Circuits Questionbank

IB Physics B.5 Current and Circuits Questionbank

IB Physics B.5 Current and Circuits Questionbank

IB Physics B.5 Current and Circuits Questionbank

IB Physics Topic B.5 Current and Circuits Questionbank