| ⇦ | 
| ⇨ |
A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when
Options
(a) number of turns in the coil is reduced
(b) a capacitance of reactance Xc = Xl is included in the same circuit
(c) an iron rod is inserted in the coil
(d) frequency of the AC source is decreased
Correct Answer:
an iron rod is inserted in the coil
Explanation:
By inserting iron rod in the coil, L ↑ z ↑ I ↓ so brightness ↓
Related Questions: - The speed of an electron having a wavelength of 10⁻¹⁰ m is
- Which of the following will be σ if Y=2.4 η?
- An electron moving in a uniform magnetic field of induction of intensity B,
- A thin and circular disc of mass M and radius R is rotating in a horizontal plane
- The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt the maximum voltage
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The speed of an electron having a wavelength of 10⁻¹⁰ m is
- Which of the following will be σ if Y=2.4 η?
- An electron moving in a uniform magnetic field of induction of intensity B,
- A thin and circular disc of mass M and radius R is rotating in a horizontal plane
- The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt the maximum voltage
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply