0%

DP IB Physics: HL

Topic Questions

Home / IB / Physics: HL / DP / Topic Questions / 11. Electromagnetic Induction (HL only) / 11.2 Power Generation & Transmission / Multiple Choice


11.2 Power Generation & Transmission

Download PDF Quick Answers
12345678910

Question 1

Marks: 1

To reduce power losses in the transmission lines between a power station and a town, two transformers are used. One is sited near to the power station and the second near to the town.

Which line correctly identifies the types of transformer used?

  Power station Town
A. step-down step-down
B. step-down step-up
C. step-up step-down
D. step-up step-up
    Choose your answer
      
    Key Concepts
    Step-Up & Step-Down Transformers
    AC Electrical Power Distribution

    Question 2

    Marks: 1

    A dynamo which outputs direct current features a coil rotating in a magnetic field.

    How is the direct current produced?

    • The induced emf in the coil changes direction every full turn and the commutator connects with a different side of the coil every half turn.

    • The induced emf in the coil changes direction every half turn and the commutator connects with the same side of the coil every half turn.

    • The induced emf in the coil does not change direction and the commutator connects with the same side of the coil.

    • The induced emf in the coil changes direction every half turn and the commutator connects with a different side of the coil every half turn.

    Choose your answer
      
    Key Concepts
    AC Generators

    Question 3

    Marks: 1

    Alternating current from a generator has a root mean square current of I.

    Which expression give the peak current?

    • 2 I

    • I square root of 2

    • I over 2

    • fraction numerator I over denominator square root of 2 end fraction

    Choose your answer
      
    Key Concepts
    Root-Mean-Square Current & Voltage

    Question 4

    Marks: 1

    A student constructs a circuit with a supply of alternating current connected to an oscilloscope. They place a diode bridge between the supply and the oscilloscope.

    Which diagram correctly represents the graph which will be seen on the oscilloscope?

    11-2-ib-hl-mcqs-easy-q4-qs--a11-2-ib-hl-mcqs-easy-q4-qs-b

    11-2-ib-hl-mcqs-easy-q4-qs-c

    11-2-ib-hl-mcqs-easy-q4-qs-d

      Choose your answer
        
      Key Concepts
      Diode Bridges
      Investigating Diode Bridges

      Question 5

      Marks: 1

      A step-down transformer has an input voltage in the primary coil of 4000 V and an output voltage of 20 V in the secondary coil.

      If the primary coil has 8000 turns, how many turns does the secondary coil have?

      • 40

      • 200

      • 80

      • 400

      Choose your answer
        
      Key Concepts
      Transformer Calculations

      Question 6

      Marks: 1

      Transformers allow current and voltage to be varied. 

      Which combination of voltage and current is the most efficient for transferring power over long distances in cables?

       

        Voltage Current
      A. high high
      B. low low
      C. high low
      D. low high
        Choose your answer
          
        Key Concepts
        AC Electrical Power Distribution

        Question 7

        Marks: 1

        A transformer receives alternating current. Both the rms voltage and the rms current increase by a factor of square root of 2.

        How is the maximum power affected?

        • It increases by a factor of square root of 2.

        • It increases by a factor of 2.

        • It increases by a factor of fraction numerator 1 over denominator square root of 2 end fraction.

        • It does not increase.

        Choose your answer
          
        Key Concepts
        Average Power Calculations

        Question 8

        Marks: 1

        The following input voltage is connected to a capacitor and resistor in parallel.

        11-2-ib-hl-mcqs-easy-q8-qs

        Which graph represents the output voltage after the capacitor-resistor configuration?

        • 11-2-ib-hl-mcqs-easy-q8-qs-graph-and-4-options-a

        • 11-2-ib-hl-mcqs-easy-q8-qs-graph-and-4-options-b

        • 11-2-ib-hl-mcqs-easy-q8-qs-graph-and-4-options-c

        • 11-2-ib-hl-mcqs-easy-q8-qs-graph-and-4-options-d

        Choose your answer
          
        Key Concepts
        Capacitors & Diode Bridges

        Question 9

        Marks: 1

        A diode bridge is shown below, alternating current is supplied between terminals 1 and 2. 

        When terminal 1 is positive, which diodes are conducting?

        11-2-ib-hl-mcqs-easy-q9-qs

        • 1 and 2

        • 3 and 4

        • 1 and 4

        • 2 and 3

        Choose your answer
          
        Key Concepts
        Diode Bridges

        Question 10

        Marks: 1

        A laptop charger must convert the alternating voltage it receives into the following direct voltage.

         

        11-2-ib-hl-mcqs-easy-q10-qs-graph-and-4-options 

        Which circuit will achieve this?

        • 11-2-ib-hl-mcqs-easy-q10-qs-graph-and-4-options-a

        • 11-2-ib-hl-mcqs-easy-q10-qs-graph-and-4-options-b

        • 11-2-ib-hl-mcqs-easy-q10-qs-graph-and-4-options-c

        • 11-2-ib-hl-mcqs-easy-q10-qs-graph-and-4-options-d

        Choose your answer
          
        Key Concepts
        Rectification


        Save My Exams Logo
        Resources
        Home Join Support

        Members
        Members Home Account Logout

        Company
        About Us Contact Us Jobs Terms Privacy Facebook Twitter

        Quick Links
        GCSE Revision Notes IGCSE Revision Notes A Level Revision Notes Biology Chemistry Physics Maths 2022 Advance Information

         
        © IB Documents (2) Team & u/aimlesskr
        IBO was not involved in the production of, and does not endorse, the resources created by Save My Exams.