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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

Ashok0210

Asked: February 21, 2021In: Class 12 Physics

Determine the current in each branch of the network shown in Fig. 3.30:

Determine the current in each branch of the network shown in Fig. 3.30:

Class 12 Physics CBSE and UP Board Current Electricity Exercise 3 Chapter-3 Exercise 3.9 NCERT Solutions for Class 12 Physics Chapter 3

Ashok0210

Asked: February 21, 2021In: Class 12 Physics

A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2.8 A. What is the steady temperature of the heating element if the room temperature is 27.0 °C? Temperature coefficient of resistance of nichrome averaged over the temperature range involved is 1.70 × 10⁻⁴ °C⁻¹

Class 12 Physics CBSE and UP Board Current Electricity Exercise 3 Chapter-3 Exercise 3.8 NCERT Solutions for Class 12 Physics Chapter 3

Ashok0210

Asked: February 21, 2021In: Class 12 Physics

A silver wire has a resistance of 2.1 Ω at 27.5 °C, and a resistance of 2.7 Ω at 100 °C. Determine the temperature coefficient of resistivity of silver.

Class 12 Physics CBSE and UP Board Current Electricity NCERT Solutions for Class 12 Physics Chapter 3 Exercise 3 Chapter-3 Exercise 3.7

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