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

The instantaneous value of an alternating current is given by $$\mathrm{i}=50 \sin (100 \pi \mathrm{t})$$. It will achieve a value of $$25 \mathrm{~A}$$ after a time interval of $$\left(\sin 30^{\circ}=0.5\right)$$

A
$$\frac{1}{300} \mathrm{~S}$$
B
$$\frac{1}{100} \mathrm{~S}$$
C
$$\frac{1}{200} \mathrm{~S}$$
D
$$\frac{1}{600} \mathrm{~S}$$
2
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.
3
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
4
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
$$50 \mathrm{~V}$$
EXAM MAP
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