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 advantage of connecting dry cells in series?

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

To decrease the total internal resistance of the power source.

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.

Its resistance increases dramatically as temperature decreases

It has very high resistivity at room temperature.

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

40000 Vm −1

400 Vm −1

None

When a candle flame is placed in a uniform electric field between two charged plates, the flame spreads out, with a larger portion bending towards the negative plate. What is the primary reason for this observation?

Positive ions are significantly more massive and larger than negative ions (electrons).

The positive plate attracts more ions from the flame.

The heat from the flame creates more positive ions than negative ions.

Negative ions move faster towards the positive plate, causing less visible spread.

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

3Ω

6Ω

18Ω

None

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

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.

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.

None

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

4Ω

0.25Ω

960Ω

14400Ω

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 internal resistance (r)

The external resistance (R)

The power dissipated by the cell

The electromotive force (e.m.f., ϵ)

None

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

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

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

None

10.

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

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

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

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