class 12 chapter-4 physics – Page 3 – Tiwari Academy Discussion

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Ashok0210

Asked: February 23, 2021In: Class 12 Physics

Two moving coil meters, M₁ and M₂ have the following particulars: R₁ = 10 Ω, N₁ = 30, A₁ = 3.6 × 10⁻³m², B₁ = 0.25 T R₂ = 14 Ω, N₂ = 42, A₂ = 1.8 × 10⁻³ 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.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.10 NCERT Solutions Class 12 Physics Chapter 4 Question 10

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically and the normal to the plane of the coil makes an angle of 30º with the direction of a uniform horizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the coil?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.9 NCERT Solutions Class 12 Physics Chapter 4

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

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.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.8 NCERT Solutions Class 12 Physics Chapter 4

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.7

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the wire?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.6

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

What is the magnitude of magnetic force per unit length on a wire carrying a current of 8 A and making an angle of 30º with the direction of a uniform magnetic field of 0.15 T?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.5

Ashok0210

Asked: February 23, 2021In: Class 12 Physics

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?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.4

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