Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
In the reverse blocking mode the middle junction (J2) has the characteristics of that of a
b Explanation: It is like a capacitor, as the dv/dt voltage triggering turns on the device. The charging current is given by, IC = CjdVa/dt.
b
Explanation: It is like a capacitor, as the dv/dt voltage triggering turns on the device. The charging current is given by, IC = CjdVa/dt.
See lessThe value of anode current required to maintain the conduction of an SCR even though the gate signal is removed is called as theThe value of anode current required to maintain the conduction of an SCR even though the gate signal is removed is called as the
b Explanation: It is the minimum anode current value required to maintain the conduction of an SCR even though the gate signal is removed. It is a very important parameter when employing an SCR in any circuit.
b
Explanation: It is the minimum anode current value required to maintain the conduction of an SCR even though the gate signal is removed. It is a very important parameter when employing an SCR in any circuit.
See lessFor the SCR to remain in the ON (conducting) state
b Explanation: Unlike the transistor devices, once the SCR is turned on by the gate terminal, the gate terminal losses its control over the device.
b
Explanation: Unlike the transistor devices, once the SCR is turned on by the gate terminal, the gate terminal losses its control over the device.
See lessThe forward break over voltage is maximum when
b Explanation: Higher the value of anode-cathode forward voltage, lower the gate requirements of the device.
b
Explanation: Higher the value of anode-cathode forward voltage, lower the gate requirements of the device.
See lessAmong the following, the most suitable method to turn on the SCR device is the
a Explanation: d) & b) are unreliable methods, c) can permanently damage the SCR Gate triggering is simple, reliable & most efficient.
a
Explanation: d) & b) are unreliable methods, c) can permanently damage the SCR Gate triggering is simple, reliable & most efficient.
See lessUsually the forward voltage triggering method is not used to turn-on the SCR because
c Explanation: In forward voltage triggering the middle junction breaks down without any gate signal and pushes the device into the conducting state. This method can permanently damage the J2 junction and make the device useless.
c
Explanation: In forward voltage triggering the middle junction breaks down without any gate signal and pushes the device into the conducting state. This method can permanently damage the J2 junction and make the device useless.
See lessA thyristor can be bought from the forward conduction mode to forward blocking mode by
d Explanation: a) & c) are used to turn on the device, b) will damage the SCR.
d
Explanation: a) & c) are used to turn on the device, b) will damage the SCR.
See lessFor a forward conducting SCR device, as the forward anode to cathode voltage is increased
b Explanation: Higher the value of anode-cathode forward voltage, lower the gate requirements of the device. Also, the forward resistance of the device is always constant as long as the junction temperature is constant.
b
Explanation: Higher the value of anode-cathode forward voltage, lower the gate requirements of the device. Also, the forward resistance of the device is always constant as long as the junction temperature is constant.
See lessThe forward break over voltage is the
b Explanation: It is the forward voltage at which the middle junction breaks down without any gate signal and pushes the device into the conducting state.
b
Explanation: It is the forward voltage at which the middle junction breaks down without any gate signal and pushes the device into the conducting state.
See lessFor an SCR in the forward blocking mode (practically)
b Explanation: In the forward blocking mode, the gate current is zero & only the middle J2 junction is reversed biased.
b
Explanation: In the forward blocking mode, the gate current is zero & only the middle J2 junction is reversed biased.
See less