Exercises basics Electrics

At a power resistor with 10 Ω a power of 5 W is converted. What power is converted when the applied voltage is doubled?

5 W

20 W

10 W

7,25 W

15 W

Resistors of different sizes are connected in parallel. Which statement is correct?

The total resistance is bigger than the smallest single resistance

The total voltage is equal to the sum of the individual voltages

The total resistance is equal to the sum of the single resistances

The current in the entire circuit is the same

The largest partial current flows through the smallest single resistor

Which statement about the circuit below is correct?

Resistors – Mixed connections

The current through R4 is half the current through R3

The current through R3 is twice the current through R4

The current through R2 is half the current through R4.

The current through R3 is twice the current through R2

The currents through R1 and R4 are equal

How does the power behave when the resistance is halved?

The power is squared

The power remains the same

The power is halved

The power doubles

The power triples

Which statement agrees with the resistance curves shown below?

Resistors curves

R3 < R2

R1 > R3

R2 > R3

R3 < R2

R2 > R1

R1 = R2