Coils wound around a soft iron core connects two bulbs, B1 and B2 of 6

1.	Coils wound around a soft iron core connects two bulbs, B1 and B2 of 6 V. Analyse the figure and answer the questions.a. If 6 V, DC is given in the coil A and the switch is on, which of the bulbs, B, & B2 will glow? Why? b. If AC is given to the coil A instead of DC, which of the bulbs will glow B1 or B2? c. Was there any variation in the brightness of Bulb B1 when AC and DC were supplied? Why? d. Write down the names of two instruments that use the principle of mutual induction.
Answer» a. Only B1 because electricity flows only through B1 b. B1 and B2 because of mutual induction. c. Light of B1 will be reduced when AC is passed through it. This is due to the back emf produced due to self-induction. d. Transformer, Relay switch.

Coils wound around a soft iron core connects two bulbs, B1 and B2 of 6 V. Analyse the figure and answer the questions.a. If 6 V, DC is given in the coil A and the switch is on, which of the bulbs, B, & B2 will glow? Why? b. If AC is given to the coil A instead of DC, which of the bulbs will glow B1 or B2? c. Was there any variation in the brightness of Bulb B1 when AC and DC were supplied? Why? d. Write down the names of two instruments that use the principle of mutual induction.

Answer»

a. Only B1 because electricity flows only through B1

b. B1 and B2 because of mutual induction.

c. Light of B1 will be reduced when AC is passed through it. This is due to the back emf produced due to self-induction.

d. Transformer, Relay switch.

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