Current Electricity! Play This Trivia Quiz

15 Questions | By Jagranjosh | Updated: Mar 22, 2022 | Attempts: 1900

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Current Electricity! Play This Trivia Quiz - 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.

In the Bohr’s model of hydrogen atom, the electron moves around the nucleus in circular orbit of radius 5 ⤬ 10^–11m. Its time period is 1.5 ⤬ 10^–16 s. The current associated with electron motion is
- 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.

The bulbs A, B and C are connected as shown in Figure. The bulbs B and C are identical. If the bulb C is fused,
- 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