An ammeter connected to an a.c circuit records 5.5. The peak current in the circuit is
7.8A
7.1A
3.8A
3.5A
Correct answer is A
\(I_o = I_{rms} \times \sqrt{2} = 5.5 \times 1.41 = 7.8A\)
112.5Hz
225.0Hz
323.5Hz
707.1Hz
Correct answer is A
fo = \(\frac{1}{2 \pi \sqrt{LC}} = \frac{1}{2 \times 3.14 \sqrt{1 \times 2 \times 10^{-6}}}\)
= 112.5Hz
If the direction of the curent in a straight wire is reversed, the magnetic field
remains the same
becomes parallel to the wire
ceases to exist
is oppositely directed
Correct answer is D
No explanation has been provided for this answer.
13.0V
11.0V
3.0V
1.0V
Correct answer is B
\(\frac{V}{R} = \frac{E}{R + r} = \frac{V}{5.5} = \frac{12}{6}\)
v = 11.0V
82.50 cm
68.18cm
15.90cm
11.95cm
Correct answer is B
L = \(\frac{R.A}{e} = \frac{4 \times 7.50 \times 106{-4}}{4.40 \times 10^{-5}} = 68.18cm\)