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?

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.

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.

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

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?

18Ω

6Ω

3Ω

2Ω

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 external resistance (R)

The internal resistance (r)

The electromotive force (e.m.f., ϵ)

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)?

9 kWh

90 kWh

9000 kWh

0.9 kWh

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

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

None

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

14400Ω

960Ω

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?

3.0 A

3.75 A

0.6 A

0.75 A

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?

The positive plate attracts more ions from the flame.

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

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

10.

Which of the following describes the characteristic of a superconductor?

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.

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

None

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