Physics Past Questions and Answers

A car battery rated 45 A H is charged with a charger whose rating is 2.5A.How long will it take to charge the battery full?

A 10 hrs
B 18 hrs
C 20 hrs
D 25 hrs

Question 32:

The electric field intensity in a place where a charge of 10^-10c experiences a force of 0.4N is?

A 4.0 x 10⁷ NC^-1
B 8.0 x 10⁹ NC^-1
C 8.O x 10^-12 NC^-1
D 4.0 x 10⁹ NC^-1

Question 33:

Two charged particles are projected into a region where there is a magnetic field perpendicular to their velocities. if the charges are deflected in opposite directions, which of the following statements is true of the charge?

A The charge must be of opposite sign
B Positive charges are more in number
C The charges are electrically neutral
D The charges are of the same sign

Question 34:

The resistance of a pieces of wire of lenght 20m are crossed-sectional area 8 x 10 ⁶m²is?
[Resistivity of the wire = 4 x 10^-7 â„¦ m]

A 5.0 â„¦
B 0.5 Ω
C 10.0 â„¦
D 1.0 â„¦

Question 35:

The figure above shows a plot of angles of deviation through a glass prism when light is incident at Î¸ degrees on the prism. The incident angle that produces the minimum deviation is

A 20^o
B 18^o
C 35^o
D 25^o