Question

electric field intensity at a point at a
distance soom from charge is a voit than
netre
change will be
9) 8x10-11C.15) 8 x 10"C C) 4x 10"/C
d) 4x1011c​

Answer 1

Answer:

Phonics Junction

Read these lines from the poem.

Switch three for a tiny wiper

Switch four to take a picture.

In the word four, the letters ou sounds like the word awe

Let us look at some more words that are pronounced th

taught

because

law

draw

daughter

caught

fault

brought

pause/

Now, look at these words. These words have the ua s

furiou

tour

cure

Answer 2

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

Answer:

Given:

Repulsive force of magnitude 6 × 10−3 N

Charge on the first sphere, q1 = 2 × 10−7 C

Charge on the second sphere, q2 = 3 × 10−7 C

Distance between the spheres, r = 30 cm = 0.3 m

Electrostatic force between the spheres is given by the relation:

F = (1/4πε0). (q1q2)/ (r2)

Where, ε0 = Permittivity of free space and (1/4πε0) =9 × 109 Nm2C−2

Therefore, force F = (9 × 109 × 2 × 10−7)/ ((0.3)2)

= 6 × 10−3N

Hence, force between the two small charged spheres is 6 × 10−3 N. The charges are of same nature. Hence, force between them will be repulsive.

Question2.