| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
Longer the electrical wires mean _______________ voltage drop.
diminishing |
|
greater |
|
lesser |
|
complete |
Electrical wires have a certain amount of resistance per foot. A longer wire means more resistance and a greater voltage drop.
Which of the following is not a characteristic of a step-up transformer?
has more turns in the secondary winding than in the primary winding |
|
the primary voltage is higher than the secondary voltage |
|
the secondary voltage is higher than the primary voltage |
|
increases voltage |
As their names indicate, a step-up transformer is used to step up or increase voltage and a step-down transformer is used to step down or decrease voltage. In a step-up transformer, the secondary voltage is higher than the primary voltage and it has more turns in the secondary winding than in the primary winding.
From what energy do photovoltaic cells produce electrical energy?
magnetic |
|
sun |
|
chemical |
|
nuclear |
A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.
A capacitor to an electronic circuit is like a _______________ to a house?
gate |
|
storage shed |
|
safe |
|
driveway |
Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
Electricity cannot flow...
through a closed circuit |
|
through a circuit under load |
|
through a circuit with resistance |
|
through an open circuit |
An electrical circuit is a path through which electricity flows. This path contains one or more components that create a load (something that is using electricity) and that load acts as resistance to the passage of electricity through the circuit. Electricity can only flow through a circuit when the path is closed and cannot flow through an open circuit.