1
MHT CET 2023 11th May Evening Shift
+1
-0

The a.c. source of e.m.f. with instantaneous value '$$e$$' is given by $$e=200 \sin (50 t)$$ volt. The r.m.s. value of current in a circuit of resistance $$50 \Omega$$ is

A
0.2828 A
B
2.828 A
C
28.28 A
D
282.8 A
2
MHT CET 2023 11th May Morning Shift
+1
-0

With the gradual increase in frequency of an a. c. source, the impedance of an LCR series circuit

A
first decreases, becomes minimum and then increases.
B
increases.
C
decreases.
D
remains constant.
3
MHT CET 2023 11th May Morning Shift
+1
-0

In series LCR circuit, the voltage across the inductance and the capacitance are not

A
out of phase with the voltage across the resistance by $$90^{\circ}$$.
B
equal in magnitude at resonance.
C
out of phase with each other by $$180^{\circ}$$.
D
in phase with the source voltage.
4
MHT CET 2023 10th May Evening Shift
+1
-0

With an alternating voltage source of frequency '$$f$$', inductor '$$L$$', capacitor '$$C$$' and resistance '$$R$$' are connected in series. The voltage leads the current by $$45^{\circ}$$. The value of '$$L$$' is $$\left(\tan 45^{\circ}=1\right)$$

A
$$\left(\frac{1+2 \pi \mathrm{fCR}}{4 \pi^2 \mathrm{f}^2 \mathrm{C}}\right)$$
B
$$\left(\frac{1-2 \pi \mathrm{fCR}}{4 \pi^2 \mathrm{f}^2 \mathrm{C}}\right)$$
C
$$\left(\frac{4 \pi^2 \mathrm{f}^2 \mathrm{C}}{1+2 \pi \mathrm{fCR}}\right)$$
D
$$\left(\frac{4 \pi^2 \mathrm{f}^2 \mathrm{C}}{1-2 \pi \mathrm{fCR}}\right)$$
EXAM MAP
Medical
NEET