Question

1. Choose the appropriate equation to solve this problem: Calculate the resistance of a bell through which a current of 5 A passes when connected to a 12 V battery.

Answers

Option 1

V = I·R

Option 2

I = V /R

Option 3

R = V/I

Question

2. Calculate the charge supplied by a battery in 2 minutes knowing that the current through the circuit is 4 A.

Answers

8 C

2 C

480 C

30 C

0,5 C

Question

3. Which element of a circuit is represented by this symbol?

Answers

light bulb

bell

push button

switch

Question

4. When we get a shock when touching another person, this person has transmitted a charge to us by:

Answers

Option 1

rubbing

Option 2

contact

Option 3

induction

Question

5. Select the conductive material:

Answers

wood

gold

cork

plastic

Question

6. What is a Coulomb?

Answers

Option 1

The charge of approximately one trillion electrons

Option 2

The unit of measurement of intensity

Option 3

A device for measuring the amount of charge

Option 4

The charge of an electron

Question

7. The force with which two charged bodies attract each other is inversely proportional to the square of:

Answers

Option 1

their charges

Option 2

conductivity in vacuum

Option 3

the distance between them

Option 4

its resistivity

Question

8. The resistance and resistivity of a material are magnitudes:

Answers

Option 1

directly proportional

Option 2

inversely proportional

Option 3

equal

Option 4

independent

Question

9.Which of these elements provides energy to a circuit?

Answers

Light bulb

Transistor

Motor

battery

Question

10. Which of these sentences describes a fuse?

Answers

Option 1

Control element that allows or interrupts the passage of current

Option 2

Protective element that has a metallic filament with a low melting point

Option 3

Conductor used to connect other elements

Option 4

Receptor that produces light

Question

11. Indicate the true sentence:

Answers

Option 1

The number of electrons entering the cell is greater than the number of electrons leaving.

Option 2

The battery supplies energy only to start the electric current

Option 3

If two light bulbs are connected in series and the second one burns out, the first one continues to light because the current still reaches it.

Option 4

Electromotive force is measured in the same units as voltage and potential difference.

Question

12. The equivalent resistance to three 2 Ω resistors placed in parallel in a circuit is:

Answers

0.67 Ω

2 Ω

1.5 Ω

6 Ω

Question

13. The current through a circuit with two resistors of 1 and 2 Ω in series, connected to a 12 V battery, is:

Answers

3 A

4 A

2 A

36 A

Question

14. In a circuit with two resistors of 1 and 2 Ω in series connected to a 12 V battery, the voltage across the 1 Ω resistor is :

Answers

2 V

3 V

4 V

12 V

Question

15. In a circuit with two resistors of 1 and 2 Ω in parallel connected to a 12 V battery , the voltage across the 1 Ω resistor is:

Answers

2 V

3 V

4 V

12 V

Question

16. To measure the voltage across two points in a circuit we use:

Answers

Option 1

an ammeter in series

Option 2

an ammeter in parallel

Option 3

a voltmeter in series

Option 4

a voltmeter in parallel

Question

17. A positively charged body:

Answers

has gained protons

has lost protons

has gained electrons

has lost electrons

Question

18. To build a circuit with a motor and a light bulb so that while the light bulb is on the motor does not work and viceversa, we need:

Answers

a switch

a two-way switch

a push button

a bell

Question

19. Which of these symbols represents an open switch?

Answers

Question

20. Calculate the electromotive force of the battery required to have a current of 6 A flowing through a resistance of 3 Ω

Answers

0,5 V

2 V

9 V

18 V