Q60.In a transformer, number of turns in the primary coil are 140 and that in the secondary coil are 280. If current in primary coil is 4 A, then that in the secondary coil is (1) 4 A (2) 2 A (3) 6 A (4) 10 A
What This Question Tests
This question involves a direct application of the transformer equation relating the number of turns in the primary and secondary coils to the currents in them.
Concepts Tested
Formulas Used
N_p/N_s = I_s/I_p
๐ NCERT Sections This Tests
4.10 โ Two Moving Coil Meters, M1 And M2 Have The Following Particulars:
Physics Class 11 ยท Chapter 4
4.10 Two moving coil meters, M1 and M2 have the following particulars: R1 = 10 โฆ, N1 = 30, A1 = 3.6 ร 10โ3 m2, B1 = 0.25 T R2 = 14 โฆ, N2 = 42, A2 = 1.8 ร 10โ3 m2, B2 = 0.50 T (The spring constants are identical for the two meters). Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M2 and M1.
4.8 โ A Closely Wound Solenoid 80 Cm Long Has 5 Layers Of Windings Of 400
Physics Class 11 ยท Chapter 4
4.8 A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.
4.4 โ A Horizontal Overhead Power Line Carries A Current Of 90 A In East To
Physics Class 11 ยท Chapter 4
4.4 A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the line?
๐ Question Details
- Chapter
- AC Circuits
- Topic
- Transformers
- Year
- 2002
- Shift
- Unknown
- Q Number
- Q60
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 7: AC Circuits
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