Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
Calculate the reactance of the inductor in the circuit diagram shown above [\(\pi = \frac{22}{7}\)]
132\(\Omega\)
214\(\Omega\)
264\(\Omega\)
269\(\Omega\)
Correct answer is C
\(X_L = 2 \pi fL = 2 \times \pi \times 60 \times 0.7 = 264\Omega \)
n = 2 to n = 1
n = 1 to n = 2
n = 2 to n = 3
n = 3 to n = 2
Correct answer is B
No explanation has been provided for this answer.
In the circuit diagram above. Calculate the energy stored in the inductor at resonance
0.100J
0.050J
0.010J
0.005J
Correct answer is B
No explanation has been provided for this answer.
The material used for constructing the core of an electromagnet is
iron
carbon
copper
steel
Correct answer is A
No explanation has been provided for this answer.
Which of the following statements about magnetic lines of force is not correct?
a magnnetic line of force is an imaginary line which the north pole of a magnet would describe if it is free to moves
magnetic lines of force do not cross one another
magnetic lines of force are closely packed together at neutral point
the presence of magnetic lines of force in a region indicates the presence of a magnetic field
Correct answer is C
No explanation has been provided for this answer.