1
MHT CET 2021 23th September Morning Shift
+1
-0

In an LCR series a.c. circuit, the voltage across each of the components L, C and R is 60 V. The voltage across the LC combination is

A
120 V
B
60 V
C
zero V
D
$$\frac{60}{\sqrt{3}}$$ V
2
MHT CET 2021 23th September Morning Shift
+1
-0

If we increase the frequency of an a.c. supply, then inductive reactance

A
increases directly with the square of frequency
B
increases as it directly proportional to frequency
C
decreases inversely with the square of frequency
D
decreases as it is inversely proportional to the frequency
3
MHT CET 2021 22th September Evening Shift
+1
-0

A capacitor of capacity '$$C$$' is charged to a potential '$$V$$'. It is connected in parallel to an inductor of inductance '$$\mathrm{L}$$'. The maximum current that will flow in the circuit is

A
$$V \sqrt{\frac{L}{C}}$$
B
$$\mathrm{V} \sqrt{\mathrm{LC}}$$
C
$$V \sqrt{\frac{C}{L}}$$
D
$$\frac{\mathrm{VC}^2}{\mathrm{~L}}$$
4
MHT CET 2021 22th September Evening Shift
+1
-0

A step down transformer is used to reduce the main supply from '$$V_1$$' volt to '$$V_2$$' volt. The primary coil draws a current '$$\mathrm{I}_1$$' $$\mathrm{A}$$ and the secondary coil draws '$$\mathrm{I}_2$$' A. $$(\mathrm{I}_1<\mathrm{I}_2)$$. The ratio of input power to output power is

A
$$\frac{V_1 V_2}{I_1 I_2}$$
B
$$\frac{V_1 I_1}{V_2 I_2}$$
C
$$\frac{\mathrm{I}_1 \mathrm{I}_2}{\mathrm{~V}_1 \mathrm{~V}_2}$$
D
$$\frac{\mathrm{V}_1 \mathrm{I}_2}{\mathrm{~V}_2 \mathrm{I}_1}$$
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