CAIE IGCSE Physics 4.2.5 Electrical Energy and Electrical Power Topic Practice

CourseCourseConceptConceptDocumentDocument

Covered syllabus points

4.2.5.1—Electric circuits transfer energy from4.2.5.2—Recall/use: for electrical power P =4.2.5.3—Recall/use: for electrical energy E =4.2.5.4—Kilowatt-hour (kWh) and calculate the

Question 1

[Maximum number: 2]

A 9.0 V battery is connected to a 120Ω120 \Omega resistor in series with wire P .
Fig. 8.1 shows a voltmeter connected across the 120Ω120 \Omega resistor.

Fig. 8.1

Fig. 8.1

State the energy changes that are taking place in the circuit.

Question 2

[Maximum number: 2]

Fig. 6.2 shows an electric circuit.

Fig. 6.2

Fig. 6.2

Calculate the electrical power transferred in the 4.2Ω4.2 \Omega resistor.

power =

[Total: 11]

Question 3

[Maximum number: 1]

There is a current I in a resistor for a time t. The potential difference (p.d) across the resistor is V.
What does the product IVt represent?

A

the charge flowing through the resistor

B

the energy transferred by the resistor

C

the power dissipated by the resistor

D

the resistance of the resistor

All question bank results loaded