5/ At a distance 4.06 m from a point charge of magnitude 5.26 x 10^-6C, the magnitude of the electric field strength is b x 10^w N/C. The value of b is

Select one:

1.16

1.28

2.87

2.95

6/A point charge of magnitude 6.910^-5 C produces an electric field of 1.010³ N/C at point P. The distance from point P to the charge is

4.310^-2 m

2.110^-1 m

2.510¹ m

6.210² m

9/During a lightning strike, 30 C of charge may move through a potential difference of 1.010⁸ V in 2.010^-2 s. The total energy released by this lightning bolt is

Select one:

3.010⁹ J

6.010⁷ J

3.310⁶ J

1.510³ J

10

A particle with a mass of 3.60 10^-18 kg acquires 4.80 10^-14J of kinetic energy when it accelerates from rest through a potential difference of 1.00 10⁴ V.

The charge on the particle is A x 10^-BC. What is the value of A?

Select one:

4.80

3.33

3.00

2.08