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.
Determine the potential difference. V across the parallel resistors
2.0V
2.3V
3.0V
0.7V
Correct answer is B
V = IR
= 0.97 x 2.4 = 2.3V
Use the diagram above to calculate the current, I.
0.60A
0.97A
1.03A
5.00A
Correct answer is B
\(\frac{1}{R} = \frac{1}{R_1} + \frac{1}{R_2}\)
= \(\frac{1}{6} + \frac{1}{4}\)
R = \(\frac{12}{5} = 2.5\Omega\)
R = 2.4 + 10 = 12.4
V = IR
I = \(\frac{v}{R} = \frac{12}{12.4} = 0.97\)
Capacitors are used in the following devices, except
water pumping machines
ceiling fans
electric irons
television sets
Correct answer is C
No explanation has been provided for this answer.
decrease
increase
remain the same
increase and collapse immediately
Correct answer is B
No explanation has been provided for this answer.
As the air column of length L in an air pipe decreases, the frequency of the sationary wave emitted
decreases
increases
varies as L2
varies as \(\sqrt{L}\)
Correct answer is A
No explanation has been provided for this answer.