Search results
Results From The WOW.Com Content Network
Secondary breakdown is a failure mode in bipolar power transistors. In a power transistor with a large junction area, under certain conditions of current and voltage, the current concentrates in a small spot of the base-emitter junction. This causes local heating, progressing into a short between collector and emitter.
A short circuit fault current can, within milliseconds, be thousands of times larger than the normal operating current of the system. [2] Damage from short circuits can be reduced or prevented by employing fuses , circuit breakers , or other overload protection , which disconnect the power in reaction to excessive current.
Bipolar disorder is among the top 20 causes of disability worldwide and leads to substantial costs for society. [26] Due to lifestyle choices and the side effects of medications, the risk of death from natural causes such as coronary heart disease in people with bipolar disorder is twice that of the general population. [4]
Bipolar disorder can also involve depressive episodes, which have the same symptoms that people with major depressive disorder experience. Symptoms of a depressive episode can include:
Cyclothymia (/ ˌ s aɪ k l ə ˈ θ aɪ m i ə /, siy-kluh-THIY-mee-uh), also known as cyclothymic disorder, psychothemia / psychothymia, [5] bipolar III, [6] affective personality disorder [7] and cyclothymic personality disorder, [8] is a mental and behavioural disorder [9] that involves numerous periods of symptoms of depression and periods ...
Current limiting is the practice of imposing a limit on the current that may be delivered to a load to protect the circuit generating or transmitting the current from harmful effects due to a short-circuit or overload. The term "current limiting" is also used to define a type of overcurrent protective device.
A bipolar electric motor is an electric motor with only two (hence bi-) poles to its stationary field. [1] They are an example of the simple brushed DC motor, with a commutator. This field may be generated by either a permanent magnet or a field coil. The 'bipolar' term refers to the stationary field of the motor, not the rotor. [1]
Bipolar disorder is a mental disorder with cyclical periods of depression and periods of elevated mood. [1] The elevated mood is significant and is known as mania, a severe elevation that can be accompanied by psychosis in some cases, or hypomania, a milder form of mania.