An iron cored coil is connected in series with an electric bulb with an ac source as shown in figure. when iron piece is taken out of the coil, the brightness of the bulb will

Fig shows a light bulb (B) and iron cored inductor connected to a DC battery through a switch (S). i) What will one observe when switch (S) is closed? ii) How will the glow of the bulb change when the battery is replaced by an ac source of rms voltage equal to the voltage of DC battery? Justify your answer in each case. OR An electric lamp having coil of negligible inductance connected in series with a Capacitor and an AC source is glowing with certain brightness. How does the brightness of the lamp change on reducing the (i) capacitance, and (ii) the frequency of ac voltage? Dear student a w h e n t h e s w i t c h S i s c l o s e d , t h e b u l b w i l l g i v e f u l l b r i g h t n e s s s l o w l y , b e c a u s e i n d u c t o r o p p o s e s t h e r i s e o f c u r r e n t i n t h e c i r c u i t d e p e n d i n g o n t h e v a l u e o f t h e r a t i o L R , w h e r e L = i n d u c tan c e a n d R = r e s i s tan c e o f t h e b u l b . b W h e n b a t t e r y i s r e p l a c e d b y a n a c s o u r c e o f r m s v o l t a g e e q u a l t o t h e d c v o l t a g e o f b a t t e r y , t h e i n d u c t o r o f f e r s r e a c tan c e X L = ω L , s o t h e i m p e d a n c e o f c i r c u i t i n c r e a s e s a n d t h e b u l b w i l l g l o w w i t h l e s s b r i g h t n e s s .

An iron cored coil is connected in series with an electric bulb with an AC source as shown…………. Class 12th Physics, Question -An iron cored coil is connected in series with an electric bulb with an AC source as shown in figure. When iron piece is taken out of the coil, the brightness of the bulb will These are the options for the question :An iron cored coil is connected in series with an electric bulb with an AC source as shown in figure. When iron piece is taken out of the coil, the brightness of the bulb will (i) decrease (ii) increase (iii) remain unaffected (iv) fluctuate The correct answer is -(ii) increase

Example 3: An iron cored coil is connected in series with an electric bulb, with an a.c. source, as shown in fig. As the iron piece is taken out of the coil, how will the brightness of bulb change? In example-3 5. If number of turns in the coil is increased, how will brightness change? 6. If the frequency of applied source is increased, how will brightness change? Views: 5,276 A are being produced at a constant rate α. The element has a decay constant λ. At time t = 0, there are N 0 ​ nuclei of the element. (a) Calculate the number N of nuclei of A at time t. (b) If α = 2 N 0 ​ λ, calculate the number of nuclei of A after one half-life of A, and also the limiting value of N as t → ∞. Views: 5,977 1 F वाले संधारित्र की प्लेटों का क्षेत्रफल अलमारी के आकार से बहुत बड़ा है। 22. किसी संधारित्र की प्लेटों के बीच पर वैद्युत पदार्थ भरने पर उसकी धारिता पर क्या प्रभाव पड़ता है? (उ० प्र० 2014) उत्तर : C = K ϵ 0 ​ से वायु की तुलना में उसकी धारिता K (परावैद्युतांक) गुना बढ़ जायेगी। 23. संधारित्र की प्लेहों के बीच परावैद्युत भरने पर धारिता क्यों बढ़ जाती है? Example 3: An iron cored coil is connected in series with an electric bulb, with an a.c. source, as shown in fig. As the iron piece is taken out of the coil, how will the brightness of bulb change? In example-3 5. If number of turns in the coil is increased, how will brightness change? 6. If the frequency of applied source is increased, how will brightness change? Updated On Sep 29, 2022 Topic Modern Physics Subject Physics Class Cl...

CONCEPT: • Self Inductance (L): Itis thepropertythat opposes the change of current flowing through an inductor. • When an iron rod is introduced into the coil, the self-inductance (L) of the coil increases. • With AC source capacitance, In aseries combination of a resistor (R), an inductance(L) • Inductance Reactance is defined as \(X_L = ω L=2\pi fL\) Where ω is the angular frequency,ƒis the frequency in Hertz,Cis the AC capacitance in Farads, and X Lis the Inductive Reactance in Ohms,. • Overall Impedance (Z) in aseries combination of a resistor (R), an inductance (L): \(Z = \sqrt\) increases. • Current in the circuit I = V/Z, decreases. • The power of the bulb P = VI will decrease. (Since voltage source is not changing and the current is decreasing.) • So the intensity of the bulb will decrease and it will glow less bright. • Hence the correct answer is option3.

The figure given below shows an arrangement by which current flows through the bulb (x) connected with coil B, when a.c. is passed through coil A. Bulb (X) Neelle Lerelereien Coil A Coil B (i) Name the phenomenon involved. (in if a copper sheet is inserted in the gap between the coils, explain how the brightness of the bulb would change. Most important