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.
2.00\(\Omega\)
2.22\(\Omega\)
18.00\(\Omega\)
18.22\(\Omega\)
Correct answer is B
\(\frac{1}{10}\)I x 20 = \(\frac{9}{10}\)I x Rs
Rs = 2.22\(\Omega\)
When two parallel wires carry currents in opposite directions, the force on either wire is
away from the other wire
zero, because the currents cancel each other
twice as much as when the currents are in the same direction
towards the other wire
Correct answer is A
No explanation has been provided for this answer.
The direction of the magnetic field at a point in the vicinity of a bar magnet is
always towards the north pole of the magnet
always away from the south pole of the magnet
along the line joining the point to the neutral point
in the direction the north pole of a compass needle would point
Correct answer is D
No explanation has been provided for this answer.
1200J
1500J
2400J
96000J
Correct answer is C
Electrical energy = IVT
= 0.5 x 40 x 2 x 60
= 2400J
When a transformer has more secondary windings than primary windings, it?
has a smaller secondary current
has a greater power output
is a step-down transformer
increases the total energy output
Correct answer is A
A transformer that increases the voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a step-up transformer.