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further maths > P2 > Flashcards

P2 Flashcards

1
Q

What is the unit of electric current?

A

Ampere (A)

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2
Q

True or False: Voltage is the measure of electric potential difference.

A

True

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3
Q

Fill in the blank: The formula for calculating power (P) is _____ = voltage (V) × current (I).

A

P

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4
Q

What is the resistance unit?

A

Ohm (Ω)

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5
Q

What does a voltmeter measure?

A

Voltage

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6
Q

Multiple Choice: Which of the following is a conductor? A) Wood B) Copper C) Rubber D) Glass

A

B) Copper

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7
Q

What is Ohm’s Law?

A

Voltage (V) = Current (I) × Resistance (R)

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8
Q

True or False: Series circuits have the same current flowing through all components.

A

True

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9
Q

Fill in the blank: In a parallel circuit, the _____ is the same across all branches.

A

Voltage

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10
Q

What does a ammeter measure?

A

Current

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11
Q

Multiple Choice: In which type of circuit do components share the same voltage? A) Series B) Parallel

A

B) Parallel

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12
Q

What is the formula for calculating total resistance in a series circuit?

A

R_total = R1 + R2 + R3 + …

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13
Q

True or False: The total current in a parallel circuit is the sum of the currents through each branch.

A

True

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14
Q

What is the effect of increasing resistance on current in a circuit with constant voltage?

A

The current decreases.

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15
Q

Fill in the blank: The power rating of an appliance is measured in _____ (unit).

A

Watts (W)

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16
Q

What does the term ‘short circuit’ refer to?

A

A low-resistance connection that bypasses normal circuit paths.

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17
Q

Multiple Choice: Which device is used to interrupt current in case of overload? A) Resistor B) Fuse C) Capacitor D) Inductor

A

B) Fuse

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18
Q

What happens to the brightness of bulbs in a series circuit if one bulb blows?

A

All bulbs go out.

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19
Q

True or False: Capacitors store electric charge.

A

True

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20
Q

What is the primary function of a resistor in a circuit?

A

To limit the flow of current.

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21
Q

Fill in the blank: The total resistance in a parallel circuit can be calculated using the formula 1/R_total = 1/R1 + 1/R2 + _____.

A

1/R3 + …

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22
Q

What is a common use for diodes in electrical circuits?

A

To allow current to flow in one direction only.

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23
Q

Multiple Choice: Which of the following components can store energy? A) Resistor B) Battery C) Capacitor D) Both B and C

A

D) Both B and C

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24
Q

True or False: Alternating current (AC) flows in one direction only.

A

False

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25
Q

What is the purpose of a circuit breaker?

A

To automatically interrupt the circuit when excessive current flows.

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26
Q

Fill in the blank: The flow of electric charge is known as _____ (term).

A

Current

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27
Q

True or False: Voltage is the measure of the energy transferred per unit charge.

A

True

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28
Q

What is the name of the device that measures electric current?

A

Ammeter

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29
Q

What is the unit of electric resistance?

30
Q

Which law states that V = IR?

A

Ohm’s Law

31
Q

True or False: A series circuit has multiple paths for current to flow.

32
Q

What happens to the total resistance in a series circuit when more resistors are added?

A

It increases.

33
Q

What is the effect on total resistance in a parallel circuit when more resistors are added?

A

It decreases.

34
Q

Fill in the blank: The total voltage in a series circuit is _____ to the sum of the individual voltages across each component.

35
Q

What is the formula for calculating energy (E) in joules?

A

E = P × t

36
Q

What type of circuit is used in household wiring?

A

Parallel circuit

37
Q

True or False: In a parallel circuit, the voltage across each component is the same.

38
Q

What does the term ‘short circuit’ refer to?

A

A low-resistance connection that bypasses the normal load.

39
Q

Fill in the blank: The symbol for a battery in a circuit diagram is _____ .

A

two parallel lines, one longer than the other

40
Q

What is the role of a fuse in an electrical circuit?

A

To protect the circuit by breaking the connection if the current is too high.

41
Q

What does a circuit breaker do?

A

It automatically interrupts the flow of current in case of overload or short circuit.

42
Q

What is the function of a resistor in a circuit?

A

To limit the current flow.

43
Q

What is the formula for calculating total resistance (R) in a parallel circuit?

A

1/R_total = 1/R1 + 1/R2 + 1/R3 + …

44
Q

True or False: The current is the same at all points in a series circuit.

45
Q

What is the relationship between voltage, current, and resistance known as?

A

Ohm’s Law

46
Q

Fill in the blank: Electrical energy is measured in _____ .

A

Joules (J)

47
Q

What is the purpose of an insulator in an electrical circuit?

A

To prevent the flow of electric current.

48
Q

What type of material is typically used as a conductor?

49
Q

What is the definition of electric power?

A

The rate at which electrical energy is transferred by an electric circuit.

50
Q

What is the unit of power?

51
Q

True or False: AC stands for alternating current.

52
Q

What does DC stand for?

A

Direct current

53
Q

Fill in the blank: The voltage in a circuit is supplied by a _____ .

A

battery or power source

54
Q

What is the primary function of a capacitor in a circuit?

A

To store electrical energy.

55
Q

What is the role of a diode in an electrical circuit?

A

To allow current to flow in one direction only.

56
Q

What is the effect of resistance on current flow?

A

Higher resistance reduces current flow.

57
Q

True or False: Power can be calculated as P = I^2R.

58
Q

What is the formula for calculating charge (Q)?

A

Q = I × t

59
Q

What is the relationship between current, charge, and time?

A

Current is the rate of flow of charge.

60
Q

Fill in the blank: An electrical circuit must have a _____ to allow current to flow.

A

complete path

61
Q

What device is used to convert electrical energy into mechanical energy?

A

Electric motor

62
Q

What is the effect of increasing voltage in a circuit?

A

It increases the current, assuming resistance remains constant.

63
Q

True or False: A voltmeter is used to measure voltage across a component.

64
Q

What is meant by the term ‘load’ in an electrical circuit?

A

The devices that consume electrical power.

65
Q

What is the purpose of a transformer?

A

To change the voltage of an alternating current.

66
Q

Fill in the blank: The flow of electric charge is called _____ .

A

electric current

67
Q

What is the effect of temperature on resistance in conductors?

A

Resistance increases with temperature.

68
Q

What is the term for the potential difference between two points in a circuit?

69
Q

True or False: Electrons flow from positive to negative terminals in a circuit.

70
Q

What is the purpose of grounding in electrical systems?

A

To provide a safe path for excess current to prevent electric shock.

further maths (10 decks)

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