Kuiz Sains Tambahan Tingkatan 5 Bab 7 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 7 Set 1

Elektrik (English)

KUIZ INI MENGANDUNGI 10 SOALAN

A battery does 180 J of work to move 45 C of charge through a component in a circuit. What is the potential difference across the component?

135V

4.0V

0.25V

8100V

None

Which of the following changes would increase the electrical resistance of a metallic conductor?

Decreasing its length.

Increasing its diameter.

Increasing its temperature.

Changing the material from nichrome to silver.

None

The main purpose of a fuse in an electrical appliance is to:

Convert electrical energy into light energy

Regulate the voltage supplied to the appliance.

Protect the appliance from excessive current by breaking the circuit.

Increase the resistance of the appliance to save energy.

None

What is the definition of one volt (1 V)?

One joule of work is done to move one coulomb of charge between two points.

One joule of energy is dissipated in one second.

One ampere of current flows when one coulomb of charge passes a point

A current of one ampere flows through a resistance of one ohm.

None

An electric current of 0.8 A flows through a lamp for 3 minutes. What is the total electric charge that passes through the lamp?

60 C

3.75 C

144 C

2.4 C

None

An electric heater has a power rating of 1500 W. How much electrical energy does it consume in 10 minutes?

15,000 J

25 J

150 J

900,000 J

None

Two copper wires, A and B, have the same length. Wire A has twice the diameter of wire B. How does the resistance of wire A (RA) compare to the resistance of wire B (RB)?

RA = 4RB

RA = 2RB

RA = 1/2RB

RA = 1/4RB

None

What is the primary reason for coiling the wire of a heating element in an appliance like an electric kettle?

To decrease the overall resistance of the heating element.

To allow the wire to expand and contract without breaking.

To create a magnetic field that helps heat the water faster.

To fit a very long wire into a compact space to achieve high total resistance.

None

A toaster has a heating element with a resistance of 40Ω. If it is connected to a 240 V power supply, what is its power dissipation?

1440 W

9600 W

6 W

0.167 W

None

10.

A microwave oven operates on a 240 V supply and draws a current of 5.5 A. Which of the following standard fuses (1 A, 5 A, 10 A, 13 A) is the most appropriate choice for this appliance?

13 A

10 A

5 A

1 A

None

1 out of 10