Kuiz Fizik Tingkatan 5 Bab 3 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 3 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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)?

0.9 kWh

9 kWh

90 kWh

9000 kWh

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

3Ω

18Ω

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).

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.

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

0.6 A

3.0 A

3.75 A

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 power dissipated by the cell

The external resistance (R)

The internal resistance (r)

None

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

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

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 rate of flow of charge between the two points.

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.

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

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.

None

Which of the following describes the characteristic of a superconductor?

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

It has very high resistivity at room temperature.

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

Its resistance increases dramatically as temperature decreases

None

10.

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

4Ω

960Ω

0.25Ω

14400Ω

None

1 out of 10