Electricity Exam: Physics Trivia Quiz!
- 1.An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
- A.
3.2A
- B.
4.2A
- C.
9.2A
- D.
8.2A
- 2.In the given figure, the resistors:
- A.
6 Ω, 3 Ω and 9 Ω are in series
- B.
9 Ω and 6 Ω are in parallel and the combination is in series with 3 ohm
- C.
3 Ω, 6 Ω and 9 Ω are in parallel
- D.
3 Ω and 6 Ω are in parallel and the combination is in series with 9 Ω
- 3.Electric power is inversely proportional to:
- A.
Resistance
- B.
Voltage
- C.
Current
- D.
Temperature
- 4.Three resistors of 1 Ω, 2 ohms,s, and 3 Ω are connected in parallel. The combined resistance of the three.
- A.
Equals 3 Ω
- B.
Less than 2Ω
- C.
Equals 2 Ω
- D.
Mor than 3 Ω
- 5.Point to be kept in mind for verification of Ohm’s Law is:
- A.
Ammeter and voltmeter should be connected in series
- B.
Ammeter should be connected in series and voltmeter in parallel
- C.
Ammeter should be connected in parallel and voltmeter in series
- D.
Ammeter and voltmeter should be connected in parallel
- 6.There is the wire of length I and cross-section A. Which of the given have the least resistance.
- A.
Length doubled, Area halved
- B.
Length tripled, Area doubled
- C.
Length halved, Area doubled
- D.
The original wire
- 7.A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is:
- A.
0.5 Ω
- B.
B. 6 Ω
- C.
12 Ω
- D.
24Ω
- 8.The resistance of a conductor depends directly on its ……… and ...... , inversely on its ………
- 9.According to ohm's Law, the ............ across the ends of a resistor is directly proportional to the ……… flowing through it, provided its ........... remains constant.
- 10.If the amount of electric charge passing through a conductor in 10 minutes is 300 C, the current flowing is:
- A.
2A
- B.
0.5A
- C.
300A
- D.
30A
- 11.An electric fuse works on the:
- A.
Chemical effect of current
- B.
Magnetic effect of current
- C.
Lightning effect of current
- D.
Heating effect of current
- 12.From the graph:
- A.
Electric power
- B.
Voltage
- C.
Resistivity
- D.
Resistance
- 13.Calculate Resistance.
- A.
150 Ω
- B.
1.5 Ω
- C.
11.5 Ω
- D.
15 Ω
- 14.If in the given arrangement, the three resistors are to be replaced by a single resistor. What will be the value of this resistor?
- A.
6 Ω
- B.
18 Ω
- C.
12 Ω
- D.
9Ω
- 15.In An Electrical Circuit Three Incandescent Bulbs A, B And C Of Rating 40 W, 60 W And 100 W Respectively Are Connected In Parallel To An Electric Source. Which Of The Following Is Likely To Happen Regarding Their Brightness?
- A.
All the three bulbs glow with same brightness
- B.
Bulb A glows with more brightness than bulb B and C
- C.
Bulb C glows with more brightness than A and B
- D.
Bulb B glows with more brightness than A and B
- 16.When a current 'I' flows through a resistance 'R' for time 't' the electrical energy spent is given by:
- A.
I 2 Rt
- B.
IRt
- C.
R 2 It
- D.
T 2 RI
- 17.Which one connected properly?
- A.
Ii
- B.
Iii
- C.
I
- D.
Iv
- 18.The resistance of a conductor increases with- I: Increase in length II: Increase in volume III: Decrease in area iv: Temperature
- A.
I&II
- B.
I&III
- C.
II&IV
- D.
III&IV
- 19.The rheostat is used in the circuit to :
- A.
Increase the magnitude of current only
- B.
Decrease the magnitude of current only
- C.
increase or decrease the magnitude of current
- D.
To increase resistance only
- 20.The total resistance?
- A.
9 Ω
- B.
12.6 Ω
- C.
12 Ω
- D.
15.6 Ω
- 21.The work done to Move a unit charge from one point to another point is called?
- A.
Resistance
- B.
Electric power
- C.
Potential difference
- D.
Electric current
- 22.SI unit of electrical Potential Difference is Ampere (A).
- A.
True
- B.
False
- 23.The commercial unit of electric power.
- A.
Watt
- B.
Kilo watt hour
- C.
Kilo watt
- D.
Joule
- 24.We prefer parallel connection over series connection because:
- A.
The voltage will not be same so that electrical devices work properly
- B.
It offers less resistance and all the device work properly
- C.
It offers more resistance if one device fails to work none of the device work
- D.
It offers more resistance and more power is dissipated
- 25.The relation between potential difference v and electrical current I given by:
- A.
Ohm's law
- B.
Joules law of heating
- C.
Series connection
- D.
Parallel connection
- E.
None of the above
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