P2

Question 1

What is the unit of electric current?

Answer 1

Ampere (A)

Question 2

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

Answer 2

True

Question 3

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

Answer 3

P

Question 4

What is the resistance unit?

Answer 4

Ohm (Ω)

Question 5

What does a voltmeter measure?

Answer 5

Voltage

Question 6

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

Answer 6

B) Copper

Question 7

What is Ohm’s Law?

Answer 7

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

Question 8

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

Answer 8

True

Question 9

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

Answer 9

Voltage

Question 10

What does a ammeter measure?

Answer 10

Current

Question 11

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

Answer 11

B) Parallel

Question 12

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

Answer 12

R_total = R1 + R2 + R3 + …

Question 13

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

Answer 13

True

Question 14

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

Answer 14

The current decreases.

Question 15

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

Answer 15

Watts (W)

Question 16

What does the term ‘short circuit’ refer to?

Answer 16

A low-resistance connection that bypasses normal circuit paths.

Question 17

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

Answer 17

B) Fuse

Question 18

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

Answer 18

All bulbs go out.

Question 19

True or False: Capacitors store electric charge.

Answer 19

True

Question 20

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

Answer 20

To limit the flow of current.

Question 21

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

Answer 21

1/R3 + …

Question 22

What is a common use for diodes in electrical circuits?

Answer 22

To allow current to flow in one direction only.

Question 23

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

Answer 23

D) Both B and C

Question 24

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

Answer 24

False

Question 25

What is the purpose of a circuit breaker?

Answer 25

To automatically interrupt the circuit when excessive current flows.

Question 26

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

Answer 26

Current

Question 27

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

Answer 27

True

Question 28

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

Answer 28

Ammeter

Question 29

What is the unit of electric resistance?

Answer 29

Ohm (Ω)

Question 30

Which law states that V = IR?

Answer 30

Ohm's Law

Question 31

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

Answer 31

False

Question 32

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

Answer 32

It increases.

Question 33

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

Answer 33

It decreases.

Question 34

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

Answer 34

equal

Question 35

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

Answer 35

E = P × t

Question 36

What type of circuit is used in household wiring?

Answer 36

Parallel circuit

Question 37

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

Answer 37

True

Question 38

What does the term 'short circuit' refer to?

Answer 38

A low-resistance connection that bypasses the normal load.

Question 39

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

Answer 39

two parallel lines, one longer than the other

Question 40

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

Answer 40

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

Question 41

What does a circuit breaker do?

Answer 41

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

Question 42

What is the function of a resistor in a circuit?

Answer 42

To limit the current flow.

Question 43

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

Answer 43

1/R_total = 1/R1 + 1/R2 + 1/R3 + ...

Question 44

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

Answer 44

True

Question 45

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

Answer 45

Ohm's Law

Question 46

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

Answer 46

Joules (J)

Question 47

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

Answer 47

To prevent the flow of electric current.

Question 48

What type of material is typically used as a conductor?

Answer 48

Copper

Question 49

What is the definition of electric power?

Answer 49

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

Question 50

What is the unit of power?

Answer 50

Watt (W)

Question 51

True or False: AC stands for alternating current.

Answer 51

True

Question 52

What does DC stand for?

Answer 52

Direct current

Question 53

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

Answer 53

battery or power source

Question 54

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

Answer 54

To store electrical energy.

Question 55

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

Answer 55

To allow current to flow in one direction only.

Question 56

What is the effect of resistance on current flow?

Answer 56

Higher resistance reduces current flow.

Question 57

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

Answer 57

True

Question 58

What is the formula for calculating charge (Q)?

Answer 58

Q = I × t

Question 59

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

Answer 59

Current is the rate of flow of charge.

Question 60

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

Answer 60

complete path

Question 61

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

Answer 61

Electric motor

Question 62

What is the effect of increasing voltage in a circuit?

Answer 62

It increases the current, assuming resistance remains constant.

Question 63

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

Answer 63

True

Question 64

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

Answer 64

The devices that consume electrical power.

Question 65

What is the purpose of a transformer?

Answer 65

To change the voltage of an alternating current.

Question 66

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

Answer 66

electric current

Question 67

What is the effect of temperature on resistance in conductors?

Answer 67

Resistance increases with temperature.

Question 68

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

Answer 68

Voltage

Question 69

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

Answer 69

False

Question 70

What is the purpose of grounding in electrical systems?

Answer 70

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