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.
To convert an alternating current dynamo into a direct current dynamo, the
number of turns in the coil is increased
strength of the field magnet is increased
slip rings are replaced with a split ring commutator
coil is wound on a soft iron armature
Correct answer is C
No explanation has been provided for this answer.
An equipment whose power is 1500W and resistance is 375 ohms would draw a current of
0.10A
2.00A
4.00A
77.5A
Correct answer is B
P = I2R \(\Rightarrow\) I = \(\sqrt\frac{P}{R}\)
I = \(\sqrt\frac{1500}{375}\)
= 2A
Which of the following obeys Ohm's Law?
Glass
Diode
All electrolytes
All metals
Correct answer is D
No explanation has been provided for this answer.
899.70\(\Omega\)
10.00\(\Omega\)
0.10\(\Omega\)
0.01\(\Omega\)
Correct answer is C
No explanation has been provided for this answer.
increase the e.m.f. of the cell to 2.0V
prevent local action in the cell
prevent polarisation in the cell
make the cell black and hence a good radiator
Correct answer is C
No explanation has been provided for this answer.