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A step-down transformer is used to connect a 6V , 30W lamp to a 200V A.C source . What will be the current in the primary coil of the transformer ????? (A ) 1.5A (B) 3A (C) 300mA (D) 150mA?
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A step-down transformer is used to connect a 6V , 30W lamp to a 200V A...
Solution:
Given:
Voltage of the AC source, V1 = 200V
Voltage of the lamp, V2 = 6V
Power of the lamp, P2 = 30W
To find:
Current in the primary coil of the transformer, I1.
Formula used:
Power = Voltage x Current
Since the transformer is ideal, the power input is equal to the power output.
Calculation:
Power output = Power input
P1 = P2
V1 x I1 = V2 x I2
I1 = (V2/V1) x I2 ------(1)
We know that the power of the lamp is 30W.
P2 = 30W
Since, Power = Voltage x Current
Therefore, I2 = P2/V2
I2 = 30W/6V
I2 = 5A
Using equation (1)
I1 = (V2/V1) x I2
I1 = (6V/200V) x 5A
I1 = 0.15A = 150mA
Therefore, the current in the primary coil of the transformer is 150mA.
Answer: (D) 150mA
Given:
Voltage of the AC source, V1 = 200V
Voltage of the lamp, V2 = 6V
Power of the lamp, P2 = 30W
To find:
Current in the primary coil of the transformer, I1.
Formula used:
Power = Voltage x Current
Since the transformer is ideal, the power input is equal to the power output.
Calculation:
Power output = Power input
P1 = P2
V1 x I1 = V2 x I2
I1 = (V2/V1) x I2 ------(1)
We know that the power of the lamp is 30W.
P2 = 30W
Since, Power = Voltage x Current
Therefore, I2 = P2/V2
I2 = 30W/6V
I2 = 5A
Using equation (1)
I1 = (V2/V1) x I2
I1 = (6V/200V) x 5A
I1 = 0.15A = 150mA
Therefore, the current in the primary coil of the transformer is 150mA.
Answer: (D) 150mA
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A step-down transformer is used to connect a 6V , 30W lamp to a 200V A.C source . What will be the current in the primary coil of the transformer ????? (A ) 1.5A (B) 3A (C) 300mA (D) 150mA?
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A step-down transformer is used to connect a 6V , 30W lamp to a 200V A.C source . What will be the current in the primary coil of the transformer ????? (A ) 1.5A (B) 3A (C) 300mA (D) 150mA? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about A step-down transformer is used to connect a 6V , 30W lamp to a 200V A.C source . What will be the current in the primary coil of the transformer ????? (A ) 1.5A (B) 3A (C) 300mA (D) 150mA? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A step-down transformer is used to connect a 6V , 30W lamp to a 200V A.C source . What will be the current in the primary coil of the transformer ????? (A ) 1.5A (B) 3A (C) 300mA (D) 150mA?.
A step-down transformer is used to connect a 6V , 30W lamp to a 200V A.C source . What will be the current in the primary coil of the transformer ????? (A ) 1.5A (B) 3A (C) 300mA (D) 150mA? for Class 11 2025 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about A step-down transformer is used to connect a 6V , 30W lamp to a 200V A.C source . What will be the current in the primary coil of the transformer ????? (A ) 1.5A (B) 3A (C) 300mA (D) 150mA? covers all topics & solutions for Class 11 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A step-down transformer is used to connect a 6V , 30W lamp to a 200V A.C source . What will be the current in the primary coil of the transformer ????? (A ) 1.5A (B) 3A (C) 300mA (D) 150mA?.
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