1
NEET 2016 Phase 1
+4
-1
A small signal voltage V(t) = V0 sin$$\omega$$t is applied across an ideal capacitor C
A
Current $$I(t)$$ is in phase with voltage $$V(t)$$.
B
Current $$I(t)$$ leads voltage V(t) by 180o
C
Current $$I(t)$$, legs voltage $$V(t)$$ by 90o.
D
Over a full cycle the capacitor C foes not consume any energy from the voltage source.
2
NEET 2016 Phase 1
+4
-1
An inductor 20 mH, a capacitor 50 $$\mu F$$ and a resistor 40 $$\Omega$$ are connected in series across a source of emf V = 10 sin 340t. The power loss in A.C. circuit is
A
0.76 W
B
0.89 W
C
0.51 W
D
0.67 W
3
AIPMT 2015
+4
-1
A series R-C circuit is connected to an alternating voltage source. Consider two situations :
(a)  When capacitor is air filled.
(b)  When capacitor is mica filled.
Current through resistor is $$I$$ and voltage across capacitor is $$V$$ then
A
$${i_a} > {i_b}$$
B
$${V_a} = {V_b}$$
C
$${V_a} < {V_b}$$
D
$${V_a} > {V_b}$$
4
AIPMT 2015 Cancelled Paper
+4
-1
A resistance 'R' draws power 'P' when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes 'Z'. the power drawn will be
A
$$P\left( {{R \over Z}} \right)$$
B
P
C
$$P{\left( {{R \over Z}} \right)^2}$$
D
$$P\sqrt {{R \over Z}}$$
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