Kuiz Fizik Tingkatan 5 Bab 3 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 3 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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

960Ω

14400Ω

0.25Ω

4Ω

None

A dry cell has an e.m.f. of 1.5 V and an internal resistance of 0.5 Ω. If it is connected to an external resistor of 2.0 Ω, what is the current flowing in the circuit?

0.75 A

3.0 A

0.6 A

3.75 A

None

Which of the following describes the characteristic of a superconductor?

It has very high resistivity at room temperature.

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

Its resistance increases dramatically as temperature decreases

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

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

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

None

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

To decrease the total internal resistance of the power source.

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.

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?

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

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

The positive plate attracts more ions from the flame.

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

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

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

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 power dissipated by the cell

The electromotive force (e.m.f., ϵ)

The internal resistance (r)

The external resistance (R)

None

10.

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

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