1
KCET 2017
MCQ (Single Correct Answer)
+1
-0
A coil of inductive reactance $1 / \sqrt{3} \Omega$ and resistance $1 \Omega$ is connected to a $200 \mathrm{~V}, 50 \mathrm{~Hz}$ AC supply. The time lag between maximum voltage and current is
A
$\frac{1}{200} \mathrm{~s}$
B
$\frac{1}{300} \mathrm{~s}$
C
$\frac{1}{500} \mathrm{~s}$
D
$\frac{1}{600} \mathrm{~s}$
2
KCET 2017
MCQ (Single Correct Answer)
+1
-0

In the A.C. circuit shown, keeping ' $K$ ' pressed, if an iron rod inserted into the coil, the bulb in the circuit,

KCET 2017 Physics - Alternating Current Question 4 English
A
glows less brightly
B
glows with same brightness (as before the rod is inserted)
C
gets damaged
D
glows more brightly
3
KCET 2017
MCQ (Single Correct Answer)
+1
-0
The output of a step down transformers is measured to be 48 V when connected to a 12 W bulb. The value of peak current is
A
$\frac{1}{\sqrt{2}} \mathrm{~A}$
B
$\sqrt{2} \mathrm{~A}$
C
$\frac{1}{2 \sqrt{2}} \mathrm{~A}$
D
$\frac{1}{4} \mathrm{~A}$
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