2A672 Code 6 Volume 1 UREs Complete

88 Questions | By Dunlapryan | Updated: Mar 21, 2022 | Attempts: 324

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Code 6 UREs volume 1 is a quiz testing your knowledge on different concepts in Physics. The topics tested vary from atomic structure, energy just to mention but a few. Take it up and see how good you are.

Questions and Answers

1.

What is the simplest form of matter?
- A.
  
  Element
- B.
  
  Mixture
- C.
  
  Electrons
- D.
  
  Compound
2.

In an atom, what electrons contain the most energy?
- A.
  
  The energy is shared equal by all electrons
- B.
  
  Orbiting electrons
- C.
  
  Valance electrons
- D.
  
  K shell electrons
3.

If there are 8 electrons in the outer most shell of an atom, then it is considered
- A.
  
  Complete
- B.
  
  Unstable
- C.
  
  Charged
- D.
  
  Stable
4.

Atoms having more than four electrons, but less than eight are known as
- A.
  
  Insulators
- B.
  
  Conductors
- C.
  
  Stable atoms
- D.
  
  Semiconductors
5.

The electrostatic fields around a positive ion move
- A.
  
  Inward
- B.
  
  Outward
- C.
  
  Inward, then outward
- D.
  
  Outward, then inward
6.

The force required to move free electrons through a conductor is known as
- A.
  
  Current
- B.
  
  Voltage
- C.
  
  Negative charge
- D.
  
  Electrostatic force
7.

What are factors that affect the resistance of a material?
- A.
  
  Area, weight, and state of material
- B.
  
  Area, temperature, and type of material
- C.
  
  Temperature, weight and state of material
- D.
  
  Temperature, type of material, and state of material
8.

What is the resistance in a circuit if the power rating is 40 watts and total current is 2 amps?
- A.
  
  40 ohms
- B.
  
  20 ohms
- C.
  
  10 ohms
- D.
  
  0.5 ohms
9.

in a series-parallel circuit, find RT if series resistor R1= 7 ohms, and parallel resistors R2 and R3= 8 ohms.
- A.
  
  23 ohms
- B.
  
  15 ohms
- C.
  
  11 ohms
- D.
  
  8 ohms
10.

In a series-parallel circuit, the series current at I1=9 amps; in the two parallel branches, I2= 5amps; and thevalue of I3 is not listed. Use Ohm's law to find the value of I3 and IT.
- A.
  
  I3= 4amps and IT= 14 amps
- B.
  
  I3=4 amps and IT=9amps
- C.
  
  I3=4 amps and IT=18 amps
- D.
  
  Not enough information to solve
11.

In a series-parallel circuit, total voltage is 12 volts, the value of E1 in the series portion of the circuit is unknown. There are two parallel branches (E2=3volts) and the value of E3 in the second parallel branch is unknown. Using Ohm's law, find the value of E1 and E3.
- A.
  
  E3= 9 volts and E1= 12 volts
- B.
  
  E3= 9 volts and E1 = 3 volts
- C.
  
  E3= 3 volts and E1= 6 volts
- D.
  
  E3= 3 volts and E1= 9 volts
12.

What is the difference between an open and a short?
- A.
  
  An open causes resistance to decrease; a short causes resistance to increase
- B.
  
  Excessive current flow in an open circuit; no current flow in a shorted component
- C.
  
  No current flow in an open circuit; excessive current flow in a shorted component
- D.
  
  Minimum voltage development across the open component; maximum voltage development across the shorted component
13.

When voltage is induced into a conductor by a relative motion between the conductor and a magnetic field this principle is known as
- A.
  
  Magnetism
- B.
  
  Reluctance
- C.
  
  Direct current
- D.
  
  Electromagnetic induction
14.

In an inductive circuit, what is meant by current lags voltage by 90 degrees?
- A.
  
  Current is zero when voltage is zero; voltage is maximum when current is maximum
- B.
  
  Current is maximum when voltage is zero; voltage is maximum when current is zero
- C.
  
  If current decreases, voltage aids in the decrease
- D.
  
  If current increases, voltage aids the increase
15.

What is the basic principle of operation of transformers?
- A.
  
  Mutual induction
- B.
  
  Magnetic induction
- C.
  
  Counterelectromotive force
- D.
  
  Primary and secondary induction
16.

What transformer winding acts as a conductor and provides the path into which voltage is induced?
- A.
  
  Field
- B.
  
  Primary
- C.
  
  Secondary
- D.
  
  Stationary
17.

If the size of the plates of a capacitor is increased, how is capacitance affected?
- A.
  
  Capacitance increases
- B.
  
  Capacitance decreases
- C.
  
  Electrons distorted and scattered
- D.
  
  Electrostatic force between the plates decreases
18.

What statement best describes a capacitive circuit?
- A.
  
  Current leads voltage by 90 degrees
- B.
  
  Applied voltage leads current by 90 degrees
- C.
  
  Has the ability to conduct in one direction and not the other
- D.
  
  Has the ability to conduct in all directions when gated or discharged
19.

In what type of circuit(s) does a capacitor oppose any change in voltage
- A.
  
  Alternating current (AC) and direct current (DC)
- B.
  
  Pulsating DC
- C.
  
  Pure DC
- D.
  
  AC
20.

What statement best describes a diode
- A.
  
  Is a five-terminal device
- B.
  
  Is a three-terminal device
- C.
  
  Has the ability to conduct in one direction and not the other
- D.
  
  Has the ability to conduct in all directions when gated or discharged
21.

What are the minority carriers in P-type material?
- A.
  
  Holes
- B.
  
  Protons
- C.
  
  Neutrons
- D.
  
  Electrons
22.

The area of a semiconductor where P-type material is joined to N-type material is known as
- A.
  
  Dielectric region
- B.
  
  Depletion region
- C.
  
  Depletion field
- D.
  
  PN region
23.

A junction diode has how many PN junction(s)?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
24.

If a negative potential is connected to the cathode and a positive potential is connected to the anode of a PN junction, the diode is
- A.
  
  Not allowing current to flow
- B.
  
  Forward biased
- C.
  
  Reverse biased
- D.
  
  Turned on
25.

In a circuit using a bridge rectifier, how many diodes are forward biased during the first cycle of alternating cuurent (AC)?
- A.
  
  4
- B.
  
  3
- C.
  
  2
- D.
  
  1