Kuiz Fizik Tingkatan 5 Bab 3 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 3 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

What is the primary reason for using a material like nichrome, which has high resistivity and a high melting point, in the heating element of an electric appliance?

To minimize the electrical energy used by the appliance, making it more efficient.

To allow the maximum amount of current to flow through the element.

To efficiently convert electrical energy into heat without melting at high operating temperatures.

To ensure the element does not conduct electricity and remains safe to touch.

None

What is the definition of potential difference (V) between two points?

The opposition to the flow of charge between the two points.

The total energy supplied by a source to move one coulomb of charge in a complete circuit.

The work done to move one coulomb of charge from one point to another.

The rate of flow of charge between the two points.

None

The graph of potential difference (V) across a dry cell versus the current (I) it delivers is a straight line with a negative slope. What physical quantity does the y-intercept of this graph represent?

The external resistance (R)

The power dissipated by the cell

The internal resistance (r)

The electromotive force (e.m.f., ϵ)

None

What is the primary advantage of connecting dry cells in series?

To allow the cells to last longer by sharing the current load.

To increase the total electromotive force (e.m.f.) of the power source.

To keep the total voltage the same as a single cell but increase the current capacity.

To decrease the total internal resistance of the power source.

None

A light bulb is labeled '60W, 240V'. What is the resistance of the bulb's filament when it is operating under normal conditions?

0.25Ω

14400Ω

960Ω

4Ω

None

An electric field is established between two parallel plates separated by a distance of 5 cm. If the potential difference between the plates is 2000 V, what is the magnitude of the electric field strength?

100000 Vm −1

100 Vm−1

400 Vm −1

40000 Vm −1

None

Three resistors with resistances of 6 Ω, 6 Ω, and 6 Ω are connected in parallel. What is the effective resistance of this combination?

2Ω

6Ω

18Ω

3Ω

None

A wire has a resistance R. If the wire is replaced by another wire of the same material and length but with twice the diameter, what will be the new resistance?

R/2

R/4

None

If an appliance with a power rating of 100 W is used for 3 hours a day for 30 days, how much electrical energy does it consume in kilowatt-hours (kWh)?

9000 kWh

90 kWh

9 kWh

0.9 kWh

None

10.

Which of the following statements correctly distinguishes between an Ohmic conductor and a non-Ohmic conductor?

Ohmic conductors are typically insulators, while non-Ohmic conductors are metals.

The V-I graph for an Ohmic conductor is a curve, while for a non-Ohmic conductor it is a straight line through the origin.

An Ohmic conductor has a constant voltage, while a non-Ohmic conductor has a constant current.

An Ohmic conductor’s resistance remains constant as current changes, whereas a non-Ohmic conductor’s resistance changes.

None

1 out of 10