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1
KCET 2019
MCQ (Single Correct Answer)
+1
-0

The frequency of an alternating current is $$50 \mathrm{~Hz}$$. What is the minimum time taken by current to reach its peak value from rms value?

A
$$5 \times 10^{-3} \mathrm{~s}$$
B
$$2.5 \times 10^{-3} \mathrm{~s}$$
C
$$0.02 \mathrm{~s}$$
D
$$10 \times 10^{-3} \mathrm{~s}$$
2
KCET 2019
MCQ (Single Correct Answer)
+1
-0

An inductor of inductance $$L$$ and resistor $$R$$ are joined together in series and connected by a source of frequency $$\omega$$. The power dissipated in the circuit is

A
$$\frac{R^2+\omega^2 L^2}{V}$$
B
$$\frac{V^2 R}{R^2+\omega^2 L^2}$$
C
$$\frac{V}{R^2+\omega^2 L^2}$$
D
$$\frac{V^2 R}{\sqrt{R^2+\omega^2 L^2}}$$
3
KCET 2018
MCQ (Single Correct Answer)
+1
-0
Which of the following, represents the variation of inductive reactance $\left(X_L\right)$ with the frequency of voltage sources $(v)$ ?
A
KCET 2018 Physics - Alternating Current Question 1 English Option 1
B
KCET 2018 Physics - Alternating Current Question 1 English Option 2
C
KCET 2018 Physics - Alternating Current Question 1 English Option 3
D
KCET 2018 Physics - Alternating Current Question 1 English Option 4
4
KCET 2018
MCQ (Single Correct Answer)
+1
-0
A 100 W bulb is connected to an AC source of $220 \mathrm{~V}, 50 \mathrm{~Hz}$. Then, the current flowing through the bulb is
A
$\frac{5}{11} \mathrm{~A}$
B
$\frac{1}{2} \mathrm{~A}$
C
2 A
D
$\frac{3}{4} \mathrm{~A}$
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