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Update posttest.json
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@vlabsdev-iitd
vlabsdev-iitd authored Dec 9, 2024
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78 changes: 39 additions & 39 deletions experiment/posttest.json
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"d": "Negligible"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1: The latching current is always higher than the holding current.",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3",
"d": "Explanation 4"
},
"correctAnswer": "a",
"difficulty": "beginner"
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"d": "Gate voltage (v<sub>g</sub>)-vs-Gate Current (I<sub>g</sub>)"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"a": "Explanation 1",
"b": "Explanation 2: v-i characteristics shows the relation between the voltage across anode-to-cathode and the anode current.",
"c": "Explanation 3",
"d": "Explanation 4"
},
"correctAnswer": "b",
"difficulty": "beginner"
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"d": "Forward breakover current"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3: Holding current is the minimum current required to keep SCR in conduction mode.",
"d": "Explanation 4"
},
"correctAnswer": "c",
"difficulty": "beginner"
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"d": "'J<sub>1</sub>, J<sub>2</sub>' are forward biased while 'J<sub>3</sub>' is reverse biased"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3: During forward blocking J<sub>1</sub> and J<sub>2</sub> are forward biased because a positive Anode-to-Cathode voltage is applied. Whereas J<sub>2</sub> is reverse biased due to the absence of gate current.",
"d": "Explanation 4"
},
"correctAnswer": "c",
"difficulty": "beginner"
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"d": "SCR continues to conduct if anode current is maintained above holding current."
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3",
"d": "Explanation 4: SCR is a semi-controlled device i.e. once turned- ON (by gate current), it continues conducting even when gate pulse is removed (provided anode current is greater than the holding current)."
},
"correctAnswer": "d",
"difficulty": "beginner"
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"d": "Allowing Gate current (I<sub>G</sub>)"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3: MOSFET is a voltage controlled device. Applying a positive Gate-to-Source voltage turns- ON the MOSFET.",
"d": "Explanation 4"
},
"correctAnswer": "c",
"difficulty": "beginner"
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"d": "Double"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"a": "Explanation 1",
"b": "Explanation 2: IGBT has lower conduction losses compared to MOSFET.",
"c": "Explanation 3",
"d": "Explanation 4"
},
"correctAnswer": "b",
"difficulty": "beginner"
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"d": "High di/dt"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3: SCR is a unidirectional device and allows current to flow only from Anode to Cathode when sufficient Gate current or firing pulses is applied.",
"d": "Explanation 4"
},
"correctAnswer": "c",
"difficulty": "beginner"
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"d": "Positive anode-to-cathode voltage (v<sub>AK</sub>) automatically turns- ON the SCR."
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"a": "Explanation 1",
"b": "Explanation 2: SCR is turned- ON by forward biasing it and giving it sufficient gate current.",
"c": "Explanation 3",
"d": "Explanation 4"
},
"correctAnswer": "b",
"difficulty": "beginner"
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"d": "All of the above methods are correct."
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1: Applying negative anode current or negative anode-to-cathode voltage reverse biases the SCR, turning it OFF.",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3",
"d": "Explanation 4"
},
"correctAnswer": "a",
"difficulty": "beginner"
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"d": "Reverse blocking"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3: In saturation mode, the IGBT current remains constant even when Collector-to-emitter voltage is increased.",
"d": "Explanation 4"
},
"correctAnswer": "c",
"difficulty": "beginner"
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"d": "Half"
},
"explanations": {
"a": "Explanation 1 <a href='www.google.com'>here</a>",
"a": "Explanation 1",
"b": "Explanation 2",
"c": "Explanation 2",
"d": "Explanation 2"
"c": "Explanation 3: Switching time of IGBT is greater than MOSFET due to the presence of tail current.",
"d": "Explanation 4"
},
"correctAnswer": "c",
"difficulty": "beginner"
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