Current Electricity! Play This Trivia Quiz

15 Questions | Total Attempts: 967

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Current Electricity! Play This Trivia Quiz

Electricity is a form of energy that is obtained from mechanical, solar just to mention but a few of the many energy sources. The electricity moves in currents through wires. The quiz below is this subject. All the best.


Questions and Answers
  • 1. 
    Given three resistors, how many different combinations of these three resistances can be made   
    • A. 

      Three

    • B. 

      Four

    • C. 

      Five

    • D. 

      Six

  • 2. 
    • A. 

      Zero

    • B. 

      1.6 ⤬ 10–19 A

    • C. 

      1.07 ⤬ 10–3 A

    • D. 

      0.17 A

  • 3. 
    The temperature (T) dependence of resistivity (p) of a semiconductor is represented by
    • A. 
    • B. 
    • C. 
    • D. 
  • 4. 
    Resistance n, each of r Ω, when connected in parallel give an equivalent resistance of R Ω. If these resistances were connected in series, the combination would have a resistance in Ω, equal to
    • A. 

      N2R

    • B. 

      R / n2

    • C. 

      R / n

    • D. 

      NR

  • 5. 
    The current in the arm CD of the circuit will be
    • A. 

      I1 + i2

    • B. 

      I2 + I3

    • C. 

      I1 + i3

    • D. 

      I1 – i2 + i3

  • 6. 
    • A. 

      Both A and B will glow more brighty,

    • B. 

      Both A and B will glow less brightly,

    • C. 

      A will glow less brightly and B will glow more brightly,

    • D. 

      A will glow more brightly and B will glow less brightly.

  • 7. 
    If R1 and R2 are the filament resistances of 200 watt and a 100 watt bulb respectively, both designed to run at the same voltage, then
    • A. 

      R1 is four times R2

    • B. 

      R2 is four times R1

    • C. 

      R1 is two times 3R2

    • D. 

      R2 is two times R1

  • 8. 
    If a high power heater is connected to electric mains, then the bulbs in the house become dim, because there is a
    • A. 

      Current drop

    • B. 

      Potential drop

    • C. 

      No current drop

    • D. 

      No potential drop

  • 9. 
    A house wiring supplied with a 220 V supply line is protected by a 6 ampere fuse. The maximum number of 60 W bulbs is parallel that can be turned on is
    • A. 

      11

    • B. 

      22

    • C. 

      33

    • D. 

      66

  • 10. 
    An electric heating element consumes 500 W, when connected to a 100 V line. If the line voltage becomes 150V, the power consumed will be:
    • A. 

      500 W

    • B. 

      750 W

    • C. 

      1000 W

    • D. 

      1125 W

  • 11. 
    A 100 W bulb B1 and two 60 W bulb B2 and B3 are connected to a 250V source as shown in the Figure. Now W1, W2 and W3 are the output powers of the bulbs B1, B2 and B3 respectively. Then
    • A. 

      W1 > W2 = W3

    • B. 

      W1 < W2 = W3

    • C. 

      W1 < W2 < W3

    • D. 

      W1 > W2 = W3

  • 12. 
    In a copper voltameter, mass deposited in thirty seconds is m grams. If the time current graph is as shown in figure. E.C.E. of copper is (current in milli ampere)
    • A. 

      0.1 m

    • B. 

      0.5 m

    • C. 

      0.6 m

    • D. 

      M

  • 13. 
    Consider the following two statements (i) Free-electro density is different in different metals. (ii) Free-electro density in a metal depends on temperature. Seebeck effect is caused
    • A. 

      Due to (i) but not due to (ii)

    • B. 

      Due to (ii) but not due (i)

    • C. 

      Due to both (i) and (ii)

    • D. 

      Neither due to (i) nor due to (ii)

  • 14. 
    If the electric current in a lamp decreases by 5 %, then the power output decreases by:
    • A. 

      2.5%

    • B. 

      5%

    • C. 

      10%

    • D. 

      20%

  • 15. 
    The thermo e.m.f. of a thermo couple varies with the temperature of the hot junction as E = a 𝜃 + b 𝜃2 in bolts where the ratio a/b is 700°C. If the cold temperature is kept at 0°C, then the neutral temperature is
    • A. 

      700°C

    • B. 

      350°C

    • C. 

      1400°C

    • D. 

      No neutral temperature is possible for this thermocouple