1
MHT CET 2021 21th September Evening Shift
+1
-0

In a step up transformer, which one of the following statements is correct?

A
Number of turns in the secondary coil is less than in primary coil.
B
Voltage in secondary coil is less than voltage is primary coil.
C
Current in the primary coil is more than current in the secondary coil.
D
Current in the primary coil is equal to current in the secondary coil.
2
MHT CET 2021 21th September Morning Shift
+1
-0

In the graphical representation of e.m.f. '$$\mathrm{e}$$' and current '$$\mathrm{i}$$' versus '$$\omega \mathrm{t}$$' for an a.c. circuit, both emf and current reach zero, minimum and maximum value at the same time. The circuit element connected to the source will be

A
pure capacitor
B
combination of capacitor and inductor
C
pure resistor
D
pure inductor
3
MHT CET 2021 21th September Morning Shift
+1
-0

An alternating voltge is represented by $$\mathrm{V}=80 \sin (100 \pi \mathrm{t}) \cos (100 \pi \mathrm{t})$$ volt. The peak voltage is

A
$$20 \mathrm{~V}$$
B
$$40 \mathrm{~V}$$
C
$$30 \mathrm{~V}$$
D
$$50 \mathrm{~V}$$
4
MHT CET 2021 21th September Morning Shift
+1
-0

A series combination of resistor 'R' and capacitor 'C' is connected to an a.c. source of angular frequency '$$\omega$$'. Keeping the voltage same, if the frequency is changed to $$\frac{\omega}{3}$$ the current becomes half of the original current. Then the ratio of capacitive reactance and resistance at the former frequency is

A
$$\sqrt{0.6}$$
B
$$\sqrt{6}$$
C
$$\sqrt{3}$$
D
$$\sqrt{2}$$
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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