Physics Past Questions and Answers

a cell of e.m.f. 1.5V and internal resistance 1.0\(\Omega\) is connected to two resistor of resistance 2.0\(\Omega\) and 3.0\(\Omega\) in series. Calculate the current through the resistors

A 0.25A
B 0.30A
C 0.35A
D 0.50A

Question 1122:

An electric lamp rated 120W is used on a 240Vrms, calculate the resistance of its filament

A 480\(\Omega\)
B 360\(\Omega\)
C 60\(\Omega\)
D 2\(\Omega\)

Question 1123:

Which of the following statements about a bar magnet is correct?

A Iron fillings cling uniformly along the length of a bar magnet
B The magnetic properties are more pronounced at the middle of a magnet
C It is impossible to have the same poles at the end of a magnet
D The magnetic properties are more pronounced at points near the end of the bar

Question 1124:

The force experienced by a current-carrying conductor move in a magnetic field is employed in the working of the i. moving coil ammeter ii. electric bell iii. electric motor. Which of the statements above are correct?

A I and ii only
B Ii and iii only
C I and iii only
D I, ii and iii

Question 1125:

The breaking up of an atomic nucleus into the fragment of nearly equal size is known as

A Nuclear fusion
B Nuclear fission
C Thermonuclear reaction
D Natural radioactivity