Physics Past Questions and Answers

Which of the following is not true of the similarities between a camera and the human eye?

A Both the camera and the human eye have light proof interiors
B Both the camera and the human eye have light sensitive screens
C Inverted images are formed on the screen in both
D The distance between the lens and the screen is fixed in both
E The amount of light entering both the eye and the camera can be adjusted

Question 577:

The magnification produced with a converging lens is 5. If the object is a square wire gauze of side 2cm, calculate the area of the image

A 100\(cm^3\)
B 40\(cm^3\)
C 20\(cm^3\)
D 10\(cm^3\)
E 4\(cm^3\)

Question 578:

A magnet is being inserted into a coil of wire. On which of the following factors does the induced e.m.f in the coil depend? I. Number of turns in the coil II. Strength of the coil III. Speed with which magnet is inserted into the coil.

A I only
B II only
C III only
D I and II only
E I, II,III only

Question 579:

The current in a series R-L-C circuit attains its maximum value when the

A Impedance is greater than the capacitive reactance
B Inductive reactance is equal to the capacitive reactance
C Inductive reactance is greater than the capacitive reactance
D Capacitive reactance is less than resistance
E Inductive reactance is greater than the capacitive reactance

Question 580:

A charge of 1 x \(10^{-5}\)C experiences a force of 40N at a certain point in space. What is the magnitude of the electric field intensity at the point in Newton and couloumb

A 8 x \(10^{6}\)
B 4 x \(10^{6}\)
C 3 x \(10^{-4}\)
D 2 x \(10^{-4}\)
E 5 x \(10^{-7}\)