Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
What physical quantity is the same for X-rays of wave length 6800 A, and radio waves of wave length 500 m?
08
Sep
What physical quantity is the same for X-rays of wave length 6800 A, and radio waves of wave length 500 m? and radio waves of wave length 500 m? What physical quantity is the same for X-rays of wave length 6800 A September 8, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP [...]
A plane electomagnetic wave travels in vaccum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wave length?
08
Sep
A plane electomagnetic wave travels in vaccum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wave length? A plane electomagnetic wave travels in vaccum along z-direction. What can you say about the directions of its [...]
A coil of inductance 50 H and resistance 100 ohm is connected to a 240 V, 50 Hz ac supply. What is the maximum current in the coil and the time lag between voltage maximum and current maximum?
08
Sep
A coil of inductance 50 H and resistance 100 ohm is connected to a 240 V, 50 Hz ac supply. What is the maximum current in the coil and the time lag between voltage maximum and current maximum? 50 Hz ac supply. What is the maximum current in the coil and the time lag between [...]
A Choke coil is needed to operate an arc lamp at 160V (rms) and 50Hz. The lamp has an effective resistnce of 5Ω when running at 10A(rms). Calculate the inductance of the choke coil. If the same arc lamp is to be operated on 160V(DC), what additional resistance is required ? Compare the power loses in both cases.
08
Sep
A Choke coil is needed to operate an arc lamp at 160V (rms) and 50Hz. The lamp has an effective resistnce of 5Ω when running at 10A(rms). Calculate the inductance of the choke coil. If the same arc lamp is to be operated on 160V(DC), what additional resistance is required ? Compare the power loses [...]
A bulb is rated at 100 V, 100 W. It can be treated as a resistor. Find out the inductance of an inductor (called choke coil) that should be connected in series with the bulb at its rated power with the help of an ac source of 200 V and 50 Hz.
08
Sep
A bulb is rated at 100 V, 100 W. It can be treated as a resistor. Find out the inductance of an inductor (called choke coil) that should be connected in series with the bulb at its rated power with the help of an ac source of 200 V and 50 Hz. A bulb is [...]
When an inductor coil is connected to an ideal battery of emf 10 V, a constant current 2.5 A flows. When the same inductor coil is connected to an ac source of 10 V and 50 Hz then the current is 2 A. Find out the indutance of the coil.
08
Sep
When an inductor coil is connected to an ideal battery of emf 10 V, a constant current 2.5 A flows. When the same inductor coil is connected to an ac source of 10 V and 50 Hz then the current is 2 A. Find out the indutance of the coil. a constant current 2.5 A [...]
A 9/100 pie inductor and a 12 ohm resistance are connected in series to a 225 V, Hz ac source. Calculate the current in the circuit and the phase angle between the current and the source voltage.
08
Sep
A 9/100 pie inductor and a 12 ohm resistance are connected in series to a 225 V, Hz ac source. Calculate the current in the circuit and the phase angle between the current and the source voltage. A 9/100 pie inductor and a 12 ohm resistance are connected in series to a 225 V Hz [...]
Show graphically that the average of sinusoidally varying current in half cycle may not be zero.
08
Sep
Show graphically that the average of sinusoidally varying current in half cycle may not be zero. Show graphically that the average of sinusoidally varying current in half cycle may not be zero. September 8, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
An a.c. source of angular frequency ω is fed across a resistor R and a capacitor C in series. The current registered is I. If you the frequency of source is changed to ω/3, maintaining the same voltage, current in the circuits is found to be halved. Caculate the ratio of reactance to resistance at the original frequency ω.
08
Sep
An a.c. source of angular frequency ω is fed across a resistor R and a capacitor C in series. The current registered is I. If you the frequency of source is changed to ω/3, maintaining the same voltage, current in the circuits is found to be halved. Caculate the ratio of reactance to resistance at [...]
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An a.c. source of angular frequency ω is fed across a resistor R and a capacitor C in series. The current registered is I. If you the frequency of source is changed to ω/3 ,
current in the circuits is found to be halved. Caculate the ratio of reactance to resistance at the original frequency ω. ,
maintaining the same voltage ,
In an RC series circuit(in fig), the rms voltage of source is 200 V and its frequency is 50 Hz, if R=100 Ω and C=100 po (μ)F, find (a) independence of the circuit. (b) power factor angle, (c ) power factor, (d) current, (e) maximum current (f) voltage across R, (g) voltage across C, (h) maximum voltage across R, (i) maximum voltage across C, (j) ltPgt, (k) >PC<. (m) i(t) , VR (t) ,and VC(t).
08
Sep
In an RC series circuit(in fig), the rms voltage of source is 200 V and its frequency is 50 Hz, if R=100 Ω and C=100 po (μ)F, find (a) independence of the circuit. (b) power factor angle, (c ) power factor, (d) current, (e) maximum current (f) voltage across R, (g) voltage across C, (h) [...]