chapter 1 – Page 38 – Tiwari Academy Discussion

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Ashok0210

Asked: February 13, 2021In: Class 12 Physics

An electric dipole with dipole moment 4 × 10⁻⁹ C m is aligned at 30° with the direction of a uniform electric field of magnitude 5 × 10⁴ NC⁻¹. Calculate the magnitude of the torque acting on the dipole.

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.10 NCERT Solutions for Class 12th Physics

Ashok0210

Asked: February 13, 2021In: Class 12 Physics

A system has two charges q₁ = 2.5 × 10⁻⁷C and q₂ = –2.5 × 10⁻⁷ C located at points A: (0, 0, –15 cm) and B: (0,0, +15 cm), respectively. What are the total charge and electric dipole moment of the system?

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.9 NCERT Solutions for Class 12th Physics

Ashok0210

Asked: February 13, 2021In: Class 12 Physics

Two point charges q₁ = 3 μC and q₂ = –3 μC are located 20 cm apart in vacuum. (a) What is the electric field at the midpoint O of the line AB joining the two charges? (b) If a negative test charge of magnitude 1.5 × 10⁻⁹ C is placed at this point, what is the force experienced by the test charge?

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.8 NCERT Solutions for Class 12th Physics

Ashok0210

Asked: February 13, 2021In: Class 12 Physics

(a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not? (b) Explain why two field lines never cross each other at any point?

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.7 NCERT Solutions for Class 12th Physics

Ashok0210

Asked: February 12, 2021In: Class 12 Physics

What is the force between two small charged spheres having charges of 2 × 10⁻⁷ C and 3 × 10 ⁻⁷ C placed 30 cm apart in air?

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.1 NCERT Solutions for Class 12th Physics

Lajvati Singh

Asked: February 9, 2021In: Class-11-Physics

One mole of an ideal gas at STP occupies 22.4 L. What is the ratio of molar volume to atomic volume of a mole of hydrogen? Why is the ratio so large. Take radius of hydrogen molecule to be 1ºA.

NCERT Solutions for Class 11 Science Properties of matter 1 Important Board Questions Dimension and Measurement NCERT Books for Session 2022-2023 CBSE Board and UP Board Numerical And Long Questions

Lajvati Singh

Asked: February 9, 2021In: Class-11-Physics

The escape velocity v of a body depends on- (i) the acceleration due to gravity ‘g’ of the planet, (ii) the radius R of the planet. Establish dimensionally the relation for the escape velocity.

NCERT Solutions for Class 11 Science Properties of matter 1 Important Board Questions Dimension and Measurement NCERT Books for Session 2022-2023 CBSE Board and UP Board Numerical And Long Questions

Lajvati Singh

Asked: February 9, 2021In: Class-11-Physics

A calorie is a unit of heat or energy and it equals 4.2 J where 1J = 1 kg m²s⁻². Suppose we employ a system of units in which unit of mass is α kg, unit of length is β m, unit of time γs. What will be magnitude of calorie in terms of this new system.

NCERT Solutions for Class 11 Science Properties of matter 1 Important Board Questions Dimension and Measurement NCERT Books for Session 2022-2023 CBSE Board and UP Board Numerical And Long Questions

Lajvati Singh

Asked: February 9, 2021In: Class-11-Physics

A laser light beamed at the moon takes 2.56s and to return after reflection at the moon’s surface. What will be the radius of lunar orbit

NCERT Solutions for Class 11 Science Properties of matter 1 Important Board Questions Dimension and Measurement NCERT Books for Session 2022-2023 CBSE Board and UP Board Numerical And Long Questions

Lajvati Singh

Asked: February 9, 2021In: Class-11-Physics

When the planet Jupiter is at a distance of 824.7 million km from the earth, its angular diameter is measured to be 35.72′′ of arc. Calculate diameter of Jupiter.

NCERT Solutions for Class 11 Science Properties of matter 1 Important Board Questions Dimension and Measurement NCERT Books for Session 2022-2023 CBSE Board and UP Board Numerical And Long Questions

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