1
MHT CET 2021 20th September Evening Shift
+1
-0

In an ideal step down transformer, out of the following quantities, which quantity increases in the secondary coil?

A
Power
B
Voltage
C
Current
D
Frequency
2
MHT CET 2021 20th September Evening Shift
+1
-0

A series LCR circuit with resistance (R) $$500 ~\mathrm{ohm}$$ is connected to an a.c. source of $$250 \mathrm{~V}$$. When only the capacitance is removed, the current lags behind the voltage by $$60^{\circ}$$. When only the inductance is removed, the current leads the voltage by $$60^{\circ}$$. The impedance of the circuit is $$\left(\tan \frac{\pi}{3}=\sqrt{3}\right)$$

A
$$\frac{500}{\sqrt{3}} \Omega$$
B
$$500 \sqrt{3} \Omega$$
C
$$250 \Omega$$
D
$$500 \Omega$$
3
MHT CET 2021 20th September Morning Shift
+1
-0

When a d.c. voltage of $$200 \mathrm{~V}$$ is applied to a coil of self-inductance $$\left(\frac{2 \sqrt{3}}{\pi}\right) \mathrm{H}$$, a current of $$1 \mathrm{~A}$$ flows through it. But by replacing d.c. source with a.c. source of $$200 \mathrm{~V}$$, the current in the coil is reduced to $$0.5 \mathrm{~A}$$. Then the frequency of a.c. supply is

A
100 Hz
B
60 Hz
C
75 Hz
D
50 Hz
4
MHT CET 2021 20th September Morning Shift
+1
-0

An inductor coil wound uniformly has self inductance 'L' and resistance 'R'. The coil is broken into two identical parts. The two parts are then connected in parallel across a battery of 'E' volt of negligible internal resistance. The current through battery at steady state is

A
$$\mathrm{\frac{2E}{R}}$$
B
$$\mathrm{\frac{3E}{R}}$$
C
$$\mathrm{\frac{4E}{R}}$$
D
$$\mathrm{\frac{E}{R}}$$
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Calculus
Coordinate Geometry
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