1
NEET 2024 (Re-Examination)
+4
-1

A step up transformer is connected to an ac mains supply of $$220 \mathrm{~V}$$ to operate at $$11000 \mathrm{~V}, 88$$ watt. The current in the secondary circuit, ignoring the power loss in the transformer, is

A
8 mA
B
4 mA
C
0.4 A
D
4 A
2
NEET 2024 (Re-Examination)
+4
-1

The amplitude of the charge oscillating in a circuit decreases exponentially as $$Q=Q_0 e^{-R t 2 L}$$, where $$Q_0$$ is the charge at $$t=0 \mathrm{~s}$$. The time at which charge amplitude decreases to $$0.50 Q_0$$ is nearly:

[Given that $$R=1.5 \Omega, L=12 \mathrm{~mH}, \ln (2)=0.693$$]

A
19.01 ms
B
11.09 ms
C
19.01 s
D
11.09 s
3
NEET 2024
+4
-1

In an ideal transformer, the turns ratio is $$\frac{N_P}{N_S}=\frac{1}{2}$$. The ratio $$V_S: V_P$$ is equal to (the symbols carry their usual meaning) :

A
$$1: 2$$
B
$$2: 1$$
C
$$1: 1$$
D
$$1: 4$$
4
NEET 2024
+4
-1

A $$10 \mu \mathrm{F}$$ capacitor is connected to a $$210 \mathrm{~V}, 50 \mathrm{~Hz}$$ source as shown in figure. The peak current in the circuit is nearly $$(\pi=3.14)$$ :

A
0.58 A
B
0.93 A
C
1.20 A
D
0.35 A
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