Physics Past Questions and Answers

A bar magnet is divided into two pieces, which of the following statement is correct?

A Two new magnets are created
B The magnetic field of each separate piece becomes stronger
C The electric field is created
D The bar magnet is demagnetized

Question 2297:

Consider the wave equation y = 5mm sin [1cm\(^{-1}\)x - 60s\(^{-1}\)t]. The wave number is?

A 0.1 cm\(^{-1}\)
B 10cm\(^{-1}\)
C 1.0cm\(^{-1}\)
D 2cm\(^{-1}\)

Question 2298:

An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?

A 15 cm
B 70 cm
C 40 cm
D 40 cm

Question 2299:

A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?

A The magnet is moved towards the stationary solenoid
B There is no relative motion
C The magnet is moved away from the stationary solenoid
D The solenoid is moved away from the stationary magnet

Question 2300:

Tyres are treaded to?

A Increase weight of tyres
B Increase friction
C Increase its longevity
D Look good