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.

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

None

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

The rate of flow of charge between the 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 work done to move one coulomb of charge from one point to another.

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 positive plate attracts more ions from the flame.

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

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

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 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.

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

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

0.75 A

3.75 A

0.6 A

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

18Ω

6Ω

3Ω

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

0.9 kWh

9000 kWh

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

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/4

R/2

None

10.

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 decrease the total internal resistance of the power source.

To keep the total voltage the same as a single cell but increase the current capacity.

None

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