Sample Paper - 2008 Subject – Physics CLASS – XII Time: Three
... What is the change in the collector current in a transistor of a.c current gain 150, for a 100 μA change in the base current? What is Bohr’s frequency condition? What is de-Broglie wavelength of an atom at absolute temperature T K. In a single slit diffraction experiment, the width of the slit is ha ...
... What is the change in the collector current in a transistor of a.c current gain 150, for a 100 μA change in the base current? What is Bohr’s frequency condition? What is de-Broglie wavelength of an atom at absolute temperature T K. In a single slit diffraction experiment, the width of the slit is ha ...
The ABC`s of electric energy and power
... Appliance with two layers of insulation Its symbol is two squares. ...
... Appliance with two layers of insulation Its symbol is two squares. ...
PHYSICS Ohm`s Law and Power Calculations OHMS WS I
... 6. A current of 0.25 amp flows through the filament of a light bulb connected to a 110-volt line. Calculate the wattage of the bulb. 7. An electric motor operates on a 120-volt line and draws a current of 0.1 amps. What is the power rating of the motor in watts? In kW? 8. A current of 2.0 amps flows ...
... 6. A current of 0.25 amp flows through the filament of a light bulb connected to a 110-volt line. Calculate the wattage of the bulb. 7. An electric motor operates on a 120-volt line and draws a current of 0.1 amps. What is the power rating of the motor in watts? In kW? 8. A current of 2.0 amps flows ...
RevExII
... In the circuit below which resistors must have the same current flowing through them? Do not assume that the resistors are identical. RII-8 ...
... In the circuit below which resistors must have the same current flowing through them? Do not assume that the resistors are identical. RII-8 ...
File
... Short Circuit – an accidental low-resistance connection between two points in a circuit, often causing excess current flow. - current travels along a different path than originally intended. Short circuits may cause: circuit damage, overheating, fire or explosion. ...
... Short Circuit – an accidental low-resistance connection between two points in a circuit, often causing excess current flow. - current travels along a different path than originally intended. Short circuits may cause: circuit damage, overheating, fire or explosion. ...
LINN KLOUT
... Provides the uncompromising power, stability and performance required to drive any loudspeaker to the highest standard of musical accuracy. ...
... Provides the uncompromising power, stability and performance required to drive any loudspeaker to the highest standard of musical accuracy. ...
Download T2800 Datasheet
... Protects the unit against high AC voltage and currents from the installation including spikes ...
... Protects the unit against high AC voltage and currents from the installation including spikes ...
For the three-phase circuit given in this problem, firstly we... balanced or unbalanced system.
... For the three-phase circuit given in this problem, firstly we want to determine if it is a balanced or unbalanced system. We then want to find the current in phasor domain. The circuit can be divided into three portions: the source, the transmission line, and the load. Let’s take a look at the volta ...
... For the three-phase circuit given in this problem, firstly we want to determine if it is a balanced or unbalanced system. We then want to find the current in phasor domain. The circuit can be divided into three portions: the source, the transmission line, and the load. Let’s take a look at the volta ...
Preliminary Project in Preparation for the Mid
... The conversion always introduces a small amount of error. The ADC will usually “sample” the variable at small time intervals, produce a number representing its magnitude, and then take another sample. It may do this several times a second. An ADC is defined by its bandwidth (the range of frequencie ...
... The conversion always introduces a small amount of error. The ADC will usually “sample” the variable at small time intervals, produce a number representing its magnitude, and then take another sample. It may do this several times a second. An ADC is defined by its bandwidth (the range of frequencie ...
CAPACITANCE
... In a 20V RC circuit, if 20V is measured across the resistor and 40V across the capacitor, the applied voltage is A. 50V B. 55V C. 60V D. 45V ...
... In a 20V RC circuit, if 20V is measured across the resistor and 40V across the capacitor, the applied voltage is A. 50V B. 55V C. 60V D. 45V ...
series circuit - Madison County Schools
... current draw on the source goes up with each new branch. If the source cannot supply the current that is demanded by the multiple resistors of the circuit, the voltage will (must!) decrease. This could be bad, as some devices, notably motors, do not like to run at low voltage and can actually be dam ...
... current draw on the source goes up with each new branch. If the source cannot supply the current that is demanded by the multiple resistors of the circuit, the voltage will (must!) decrease. This could be bad, as some devices, notably motors, do not like to run at low voltage and can actually be dam ...
Series Circuits - University of St. Thomas
... Parallel Circuits A parallel circuit allows multiple paths for electricity to flow through. Also note that the dough acts as a resistor and a wire, therefore the resistors as show in the schematic are not needed. ...
... Parallel Circuits A parallel circuit allows multiple paths for electricity to flow through. Also note that the dough acts as a resistor and a wire, therefore the resistors as show in the schematic are not needed. ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.