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

The inductive reactance of a coil is R$$\Omega$$. If the inductance of a coil is doubled and frequency of a.c. supply is also doubled then the new inductive reactance will be

A
2R
B
8R
C
$$\mathrm{\frac{R}{2}}$$
D
4R
2
MHT CET 2021 21th September Evening Shift
+1
-0

Three pure inductors each of inductance 6H are connected as shown in the figure. Their equivalent inductance between the points 'P' and 'Q' is

A
0.5 H
B
18 H
C
6.3 H
D
2 H
3
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
$$\frac{1}{600} \mathrm{~S}$$
4
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.
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Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
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Coordinate Geometry
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