Kuiz Fizik Tingkatan 5 Bab 3 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 3 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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

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

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

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

None

Which of the following describes the characteristic of a superconductor?

It can conduct electricity with zero resistance below a certain critical temperature.

It is a type of insulator that becomes a conductor only at very high temperatures.

It has very high resistivity at room temperature.

Its resistance increases dramatically as temperature decreases

None

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

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

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

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

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

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.

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

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 electromotive force (e.m.f., ϵ)

The external resistance (R)

The power dissipated by the cell

The internal resistance (r)

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?

6Ω

18Ω

3Ω

2Ω

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 rate of flow of charge between the two points.

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

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

400 Vm −1

100 Vm−1

40000 Vm −1

None

10.

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)?

9 kWh

9000 kWh

90 kWh

0.9 kWh

None

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