Vajrakali

Vanshya

Asked: February 13, 2021In: Class-11-Physics

Give an example in which a force does work on a body but fails to change its K.E.

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2022-2023 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

How high must a body be lifted to gain an amount of P.E. equal to the K.E. it has when moving at speed 20 ms⁻¹. (The value of acceleration due to gravity at a place is 9.8 ms⁻²).

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2022-2023 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

Is it necessary that work done in the motion of a body over a closed loop is zero for every force in nature ? Why?

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2022-2023 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

A truck and a car moving with the same K.E. on a straight road. Their engines are simultaneously switched off which one will stop at a lesser distance?

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2022-2023 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

Mountain roads rarely go straight up the slope, but wind up gradually. Why?

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2022-2023 CBSE Board and UP Board 2 Marks Questions

Vanshya

Asked: February 13, 2021In: Class-11-Physics

How much work is done by a coolie walking on a horizontal platform with a load on his head ? Explain.

NCERT Solutions for Class 11 Science Work energy and power 4 Important Board Questions Work energy and power NCERT Books for Session 2022-2023 CBSE Board and UP Board 2 Marks Questions

Ashok0210

Asked: February 13, 2021In: Class 12 Physics

A point charge +10 μC is a distance 5 cm directly above the centre of a square of side 10 cm, as shown in Fig. 1.34. What is the magnitude of the electric flux through the square? (Hint: Think of the square as one face of a cube with edge 10 cm.)

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.18 NCERT Solutions for Class 12th Physics

Ashok0210

Asked: February 13, 2021In: Class 12 Physics

Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the box is 8.0 × 10³ Nm²/C. (a) What is the net charge inside the box? (b) If the net outward flux through the surface of the box were zero, could you conclude that there were no charges inside the box? Why or Why not?

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.17 NCERT Solutions for Class 12th Physics

Ashok0210

Asked: February 13, 2021In: Class 12 Physics

What is the net flux of the uniform electric field of Exercise 1.15 through a cube of side 20 cm oriented so that its faces are parallel to the coordinate planes?

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.16 NCERT Solutions for Class 12th Physics

Ashok0210

Asked: February 13, 2021In: Class 12 Physics

Consider a uniform electric field E = 3 × 10³ î N/C. (a) What is the flux of this field through a square of 10 cm on a side whose plane is parallel to the yz plane? (b) What is the flux through the same square if the normal to its plane makes a 60° angle with the x-axis?

Class-12th Physics, CBSE and UP Board Electric Charges and Fields, Chapter-1, Exercise -1, Q-1.15 NCERT Solutions for Class 12th Physics

Vajrakali

Give an example in which a force does work on a body but fails to change its K.E.

How high must a body be lifted to gain an amount of P.E. equal to the K.E. it has when moving at speed 20 ms⁻¹. (The value of acceleration due to gravity at a place is 9.8 ms⁻²).

Is it necessary that work done in the motion of a body over a closed loop is zero for every force in nature ? Why?

A truck and a car moving with the same K.E. on a straight road. Their engines are simultaneously switched off which one will stop at a lesser distance?

Mountain roads rarely go straight up the slope, but wind up gradually. Why?

How much work is done by a coolie walking on a horizontal platform with a load on his head ? Explain.

A point charge +10 μC is a distance 5 cm directly above the centre of a square of side 10 cm, as shown in Fig. 1.34. What is the magnitude of the electric flux through the square? (Hint: Think of the square as one face of a cube with edge 10 cm.)

What is the net flux of the uniform electric field of Exercise 1.15 through a cube of side 20 cm oriented so that its faces are parallel to the coordinate planes?

Consider a uniform electric field E = 3 × 10³ î N/C. (a) What is the flux of this field through a square of 10 cm on a side whose plane is parallel to the yz plane? (b) What is the flux through the same square if the normal to its plane makes a 60° angle with the x-axis?

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