In which of the following diagrams is the length of the tube equal to one wavelength?
a
b
c
d
Correct answer is C
No explanation has been provided for this answer.
Which of the following instruments consumes the highest current?
|
I. Electric iron II. Television set III. Torch light IV. Immersion heater |
250v 220v 6v 110v |
1kW 110W 30W 500W |
2
I
II
III
IV
Correct answer is C
(I) I = \(\frac{P}{V} = \frac{1000}{25}\) = 4A
(II) I = \(\frac{110}{220}\) = 0.5A
(III) I = \(\frac{30}{6}\) = 5A
(IV) I = \(\frac{500}{110}\) = 4.55A
In the figure, the value of R is
3\(\Omega\)
6\(\Omega\)
4\(\Omega\)
5\(\Omega\)
Correct answer is B
R\(_T\) = \(\frac{V}{1} = \frac{12}{2}\) = 6\(\Omega\)
R\(_T\) = 3 + \(\frac{R \times 6}{R + 6}\)
R = 6\(\Omega\)
cooling temperature
boiling point
melting point
vaporization point
Correct answer is C
No explanation has been provided for this answer.
28.0N
48.0N
288.0N
50.0N
Correct answer is D
V.E = 6, load = 120N
Efficiency = M.A x \(\frac{1}{V.R}\) x 100%
40 = \(\frac{120}{effort}\) x \(\frac{1}{6}\) x \(\frac{100}{1}\)
Effort = 50N
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