Grouping of Electrical Appliances- MCQ-Basic

Grouping of Electrical Appliances- MCQ-Basic

Dear Readers,

Physics is an important subject in preparation for various Competitive exams. To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on Grouping of Electrical Appliances.You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. When three identical bulbs of 60 W, 200 V rating are connected in series at a 200 V supply, the power drawn by them will be

•  10 W
•  20 W
•  60 W
•  180 W

20 W

Q2. In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in India is R, the resistance of a 60 W bulb for use in USA will be

•  R/4
•  R/2
•  R
•  2R

R/4

Q3. Two 220 V, 100 W bulbs are connected first in series and then in parallel. Each time the combination is connected to 220 V ac supply line. The power drawn by the combination in each case respectively will be

•  100 W, 50 W
•  200 W, 150 W
•  50 W, 200 W
•  50 W, 100 W

50 W, 200 W

Q4. wire when connected to 220V mains supply has power dissipation P₁ . Now the wire is cut into two equal pieces which are connected in parallel to the same supply. Power dissipation in this case is P₂ . Then P₂ / P₁is

•  1
•  4
•  2
•  3

4

Q5. n identical bulbs, each designed to draw a power p from a certain voltage supply, are joined in series across that supply. The total power which they will draw is

•  p/n²
•  p/n
•  p
•  np

p/n

Q6. An electric kettle has two heating coils. When one coil is used, water in the kettle boils in 5 minutes, while when second coil is used, same water boils in 10 minutes. If the two coils, connected in parallel are used simultaneously, the same water will boil in time

•  3 min 20 sec
•  5 min
•  7 min 30 sec
•  2 min 30 sec

3 min 20 sec

Q7. Two bulbs of 500 W and 200 W are manufactured to operate on 220 V line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are joined in parallel and secondly in series will be

•  5/2 , 2/5
•  5/2 , 5/2
•  2/5 , 5/2
•  2/5 , 2/5

5/2 , 2/5

Q8. Two resistances are connected in series across a battery and consume a power P. If these are connected in parallel the power consumed will be

•  P
•  4P
•  2P
•  P/4

4P

Q9. A uniform wire connected across a supply produces heat H per second. If the wire is cut into n equal parts and all the parts are connected in parallel across the same supply, the heat produced per second will be

•  H/n²
•  n²H
•  nH
•  H/n

n²H

Q10. A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. If both length and radius of the wire are halved then the heat developed in the same duration will become

•  Half
•  Twice
•  One-fourth
•  Same

Half