1
JEE Main 2021 (Online) 17th March Evening Shift
+4
-1
What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved?
A
Both, inducting reactance and current will be doubled.
B
Inductive reactance will be doubled and current will be halved.
C
Both, inductive reactance and current will be halved.
D
Inductive reactance will be halved and current will be doubled.
2
JEE Main 2021 (Online) 17th March Morning Shift
+4
-1
An AC current is given by I = I1 sin$$\omega$$t + I2 cos$$\omega$$t. A hot wire ammeter will give a reading :
A
$${{{I_1} + {I_2}} \over {\sqrt 2 }}$$
B
$$\sqrt {{{I_1^2 - I_2^2} \over 2}}$$
C
$$\sqrt {{{I_1^2 + I_2^2} \over 2}}$$
D
$${{{I_1} + {I_2}} \over {2\sqrt 2 }}$$
3
JEE Main 2021 (Online) 16th March Evening Shift
+4
-1
For the given circuit, comment on the type of transformer used.

A
Auxiliary transformer
B
Step down transformer
C
Step-up transformer
D
Auto transformer
4
JEE Main 2021 (Online) 16th March Morning Shift
+4
-1
An RC circuit as shown in the figure is driven by a AC source generating a square wave. The output wave pattern monitored by CRO would look close to :

A
B
C
D
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