Alternating Current · Physics · AIIMS

A transformer with turns ratio $$\frac{N_1}{N_2}=\frac{50}{1}$$ is connected to a $$120 \mathrm{~V}$$ AC supply. If primary and secondary circuit resistances are $$1.5 \mathrm{~k} \Omega$$ and $$1 \Omega$$ respectively, then find out power of output.

If maximum energy is stored in a capacitor at t = 0, then find the time after which current in the circuit will be maximum.

In a $$L C R$$ series circuit source voltage is $$120 \mathrm{~V}$$ and voltage in inductor $$50 \mathrm{~V}$$ and resistance is $$40 \mathrm{~V}$$, then determine voltage in the capacitor

In a series R-C circuit shown in figure, the applied voltage is 10 V and the voltage across capacitor is found to be 8V. Then, the voltage across R and the phase difference between current and the applied voltage will respectively be

An ideal coil of $$10 \mathrm{~H}$$ is connected in series with a resistance of $$5 \Omega$$ and a battery of $$5 \mathrm{~V}$$. After $$2 \mathrm{~s}$$, after the connection is made, the current flowing (in ampere) in the circuit is

In a circuit $$L, C$$ and $$R$$ are connected in series with an alternating voltage source of frequency $$f$$. The current leads the voltage by $$45^{\circ}$$. The value of $$C$$ is

A series R-C circuit is connected to AC voltage source. Consider two cases; (A) When C is without a dielectric medium and (B) When C is filled with dielectric of constant 4. The current I$$_R$$ through the resistor and voltage V$$_C$$ across the capacitor are compared in two cases.

Assertion : The average value of alternating emf is $$63.39 \%$$ of the peak value.

Reason : The rms value of alternating emf is $$70.72 \%$$ of peak value.